Let's Learn English! Topic: Space! ๐Ÿš€๐Ÿ‘ฉโ€๐Ÿš€๐Ÿ›ฐ๏ธ (Lesson Only)

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2024-01-07 ใƒป Learn English with Bob the Canadian


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Let's Learn English! Topic: Space! ๐Ÿš€๐Ÿ‘ฉโ€๐Ÿš€๐Ÿ›ฐ๏ธ (Lesson Only)

28,924 views ใƒป 2024-01-07

Learn English with Bob the Canadian


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋ฒˆ์—ญ๋œ ์ž๋ง‰์€ ๊ธฐ๊ณ„ ๋ฒˆ์—ญ๋ฉ๋‹ˆ๋‹ค.

00:00
Well, hello, and welcome to
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์•ˆ๋…•ํ•˜์„ธ์š”.
00:01
this English lesson about space.
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์šฐ์ฃผ์— ๊ด€ํ•œ ์˜์–ด ์ˆ˜์—…์— ์˜ค์‹  ๊ฒƒ์„ ํ™˜์˜ํ•ฉ๋‹ˆ๋‹ค.
00:04
We live on the planet Earth, but when you
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์šฐ๋ฆฌ๋Š” ์ง€๊ตฌ๋ผ๋Š” ํ–‰์„ฑ์— ์‚ด๊ณ  ์žˆ์ง€๋งŒ
00:07
look up at the night sky, you just see
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๋ฐคํ•˜๋Š˜์„ ์˜ฌ๋ ค๋‹ค๋ณด๋ฉด
00:10
a great expanse of blackness with some stars.
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๋ช‡ ๊ฐœ์˜ ๋ณ„์ด ์žˆ๋Š” ๊ฑฐ๋Œ€ํ•œ ์–ด๋‘ ์ด ํŽผ์ณ์ ธ ์žˆ๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
00:14
And sometimes you can see a planet.
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๋•Œ๋กœ๋Š” ํ–‰์„ฑ์„ ๋ณผ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
00:17
It kind of just looks like a bright star.
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๊ทธ๊ฒƒ์€ ๋‹จ์ง€ ๋ฐ์€ ๋ณ„์ฒ˜๋Ÿผ ๋ณด์ž…๋‹ˆ๋‹ค.
00:19
And of course, you can see the moon most nights.
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๋ฌผ๋ก  ๋Œ€๋ถ€๋ถ„์˜ ๋ฐค์—๋Š” ๋‹ฌ์„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
00:22
During the day, all you can really see is
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๋‚ฎ์—๋Š” ์‹ค์ œ๋กœ ๋ณผ ์ˆ˜ ์žˆ๋Š” ๊ฒƒ์€
00:25
the sun because the blue sky kind of blocks
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ํƒœ์–‘๋ฟ์ž…๋‹ˆ๋‹ค. ํ‘ธ๋ฅธ ํ•˜๋Š˜์ด
00:28
our view of the rest of space.
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๋‚˜๋จธ์ง€ ๊ณต๊ฐ„์— ๋Œ€ํ•œ ์‹œ์•ผ๋ฅผ ๊ฐ€๋ฆฌ๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
00:31
But space is fascinating.
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ํ•˜์ง€๋งŒ ๊ณต๊ฐ„์€ ๋งค๋ ฅ์ ์ด๋‹ค.
00:34
I personally love stories about space.
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๋‚˜๋Š” ๊ฐœ์ธ์ ์œผ๋กœ ์šฐ์ฃผ์— ๊ด€ํ•œ ์ด์•ผ๊ธฐ๋ฅผ ์ข‹์•„ํ•œ๋‹ค.
00:37
I like science fiction novels
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๋‚˜๋Š” SF ์†Œ์„ค
00:39
and science fiction tv shows.
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๊ณผ SF TV ์‡ผ๋ฅผ ์ข‹์•„ํ•ฉ๋‹ˆ๋‹ค.
00:41
I like shows that take place in space.
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๋‚˜๋Š” ์šฐ์ฃผ์—์„œ ํŽผ์ณ์ง€๋Š” ์‡ผ๋ฅผ ์ข‹์•„ํ•œ๋‹ค.
00:44
So I thought it would be fun to do
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๊ทธ๋ž˜์„œ
00:47
a lesson about all of the words and phrases
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00:49
that we use in English to talk about space.
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์šฐ๋ฆฌ๊ฐ€ ์˜์–ด๋กœ ์šฐ์ฃผ์— ๋Œ€ํ•ด ์ด์•ผ๊ธฐํ•  ๋•Œ ์‚ฌ์šฉํ•˜๋Š” ๋ชจ๋“  ๋‹จ์–ด์™€ ๋ฌธ๊ตฌ์— ๋Œ€ํ•ด ์ˆ˜์—…์„ ํ•˜๋ฉด ์žฌ๋ฏธ์žˆ์„ ๊ฑฐ๋ผ๊ณ  ์ƒ๊ฐํ–ˆ์–ด์š”.
00:52
So, once again, welcome to
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๋‹ค์‹œ ํ•œ ๋ฒˆ
00:53
this English lesson about space. Space.
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์šฐ์ฃผ์— ๊ด€ํ•œ ์˜์–ด ์ˆ˜์—…์— ์˜ค์‹  ๊ฒƒ์„ ํ™˜์˜ํ•ฉ๋‹ˆ๋‹ค. ๊ณต๊ฐ„.
00:58
So I kind of explained what
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๊ทธ๋ž˜์„œ
00:59
space is in my introduction.
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์ œ ์„œ๋ก ์—์„œ ๊ณต๊ฐ„์ด ์–ด๋–ค ๊ฒƒ์ธ์ง€์— ๋Œ€ํ•ด ์„ค๋ช…์„ ๋“œ๋ ธ์Šต๋‹ˆ๋‹ค.
01:01
There's the world we live in.
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์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์„ธ์ƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
01:03
We walk on the Earth every day.
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์šฐ๋ฆฌ๋Š” ๋งค์ผ ์ง€๊ตฌ ์œ„๋ฅผ ๊ฑท์Šต๋‹ˆ๋‹ค.
01:06
It's kind of gravity that keeps us here, but way
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์šฐ๋ฆฌ๋ฅผ ์—ฌ๊ธฐ์— ๋จธ๋ฌผ๊ฒŒ ํ•˜๋Š” ๊ฒƒ์€ ์ผ์ข…์˜ ์ค‘๋ ฅ์ด์ง€๋งŒ,
01:09
up in the sky, if you go further, far enough.
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๋” ๋ฉ€๋ฆฌ ๊ฐ€๋ฉด ํ•˜๋Š˜ ๋†’์ด๊นŒ์ง€ ์˜ฌ๋ผ๊ฐˆ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
01:13
Sorry, if you go far enough,
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์ฃ„์†กํ•ฉ๋‹ˆ๋‹ค. ์ถฉ๋ถ„ํžˆ ๋ฉ€๋ฆฌ ๊ฐ€๋ฉด
01:15
you are eventually in space.
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๊ฒฐ๊ตญ ์šฐ์ฃผ์— ์žˆ๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
01:17
We sometimes call it outer space, and we simply
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์šฐ๋ฆฌ๋Š” ๋•Œ๋•Œ๋กœ ๊ทธ๊ฒƒ์„ ์šฐ์ฃผ๋ผ๊ณ  ๋ถ€๋ฅด๋Š”๋ฐ, ๋‹จ์ˆœํžˆ
01:20
use this word to refer to everything that's not
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์ด ๋‹จ์–ด๋ฅผ
01:24
the Earth or other planets or suns or stars.
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์ง€๊ตฌ๋‚˜ ๋‹ค๋ฅธ ํ–‰์„ฑ, ํƒœ์–‘์ด๋‚˜ ๋ณ„์ด ์•„๋‹Œ ๋ชจ๋“  ๊ฒƒ์„ ์ง€์นญํ•˜๋Š” ๋ฐ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค.
01:27
So space is kind of that big area up
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๊ทธ๋ž˜์„œ ์šฐ์ฃผ๋Š”
01:31
in past the sky where we sometimes send rockets.
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์šฐ๋ฆฌ๊ฐ€ ๋•Œ๋•Œ๋กœ ๋กœ์ผ“์„ ๋ณด๋‚ด๋Š” ํ•˜๋Š˜ ๋„ˆ๋จธ์˜ ํฐ ์˜์—ญ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค.
01:36
But not all the time, not as often as I would like.
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ํ•˜์ง€๋งŒ ํ•ญ์ƒ ๊ทธ๋Ÿฐ ๊ฒƒ์€ ์•„๋‹ˆ๊ณ  ๋‚ด๊ฐ€ ์›ํ•˜๋Š” ๋งŒํผ ์ž์ฃผ๋Š” ์•„๋‹™๋‹ˆ๋‹ค.
01:40
I would love it if we already had a
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์šฐ๋ฆฌ๊ฐ€ ์ด๋ฏธ
01:42
colony on Mars, if we already were exploring space.
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ํ™”์„ฑ์— ์‹๋ฏผ์ง€๋ฅผ ๊ฐ–๊ณ  ์žˆ๋‹ค๋ฉด, ์šฐ๋ฆฌ๊ฐ€ ์ด๋ฏธ ์šฐ์ฃผ๋ฅผ ํƒํ—˜ํ•˜๊ณ  ์žˆ๋‹ค๋ฉด ์ •๋ง ์ข‹๊ฒ ์Šต๋‹ˆ๋‹ค.
01:46
I wish we had a colony on Mars and the moon.
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ํ™”์„ฑ๊ณผ ๋‹ฌ์—๋„ ์‹๋ฏผ์ง€๊ฐ€ ์žˆ์—ˆ์œผ๋ฉด ์ข‹๊ฒ ์Šต๋‹ˆ๋‹ค.
01:48
I would go to both of them for a vacation, for sure.
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๋‚˜๋Š” ํ™•์‹คํžˆ ํœด๊ฐ€๋ฅผ ์œ„ํ•ด ๋‘ ๊ณณ ๋ชจ๋‘์— ๊ฐˆ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
01:54
But, yes, space.
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ํ•˜์ง€๋งŒ ๊ทธ๋ ‡์Šต๋‹ˆ๋‹ค. ๊ณต๊ฐ„์ž…๋‹ˆ๋‹ค.
01:55
All of that area way up there, the solar system.
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๊ทธ ๋ชจ๋“  ์ง€์—ญ์€ ํƒœ์–‘๊ณ„์ž…๋‹ˆ๋‹ค.
02:00
Let me make this a bit bigger for you.
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์ด๊ฒƒ์„ ์ข€ ๋” ํฌ๊ฒŒ ๋งŒ๋“ค์–ด ๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค.
02:02
So the solar system contains the sun and
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๋”ฐ๋ผ์„œ ํƒœ์–‘๊ณ„์—๋Š” ํƒœ์–‘๊ณผ
02:06
all of the planets that orbit the sun.
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ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•˜๋Š” ๋ชจ๋“  ํ–‰์„ฑ์ด ํฌํ•จ๋ฉ๋‹ˆ๋‹ค.
02:08
So I think it's Mercury,
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๊ทธ๋ž˜์„œ ์ €๋Š” ๊ทธ๊ฒƒ์ด ์ˆ˜์„ฑ,
02:09
Venus, Earth, Mars, Jupiter, Saturn.
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๊ธˆ์„ฑ, ์ง€๊ตฌ, ํ™”์„ฑ, ๋ชฉ์„ฑ, ํ† ์„ฑ์ด๋ผ๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.
02:12
Is it Neptune and then Uranus? I'm not sure.
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ํ•ด์™•์„ฑ ๋‹ค์Œ์€ ์ฒœ์™•์„ฑ์ธ๊ฐ€์š”? ์ž˜ ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
02:14
But anyways, our solar system
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ํ•˜์ง€๋งŒ ์–ด์จŒ๋“  ์šฐ๋ฆฌ ํƒœ์–‘๊ณ„๋Š”
02:17
consists of a central star.
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์ค‘์‹ฌ๋ณ„๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
02:19
And around that star, we have planets that orbit
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๊ทธ๋ฆฌ๊ณ  ๊ทธ ๋ณ„ ์ฃผ์œ„์—๋Š”
02:23
Earth is the third planet from the sun.
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ํƒœ์–‘์—์„œ ์„ธ ๋ฒˆ์งธ ํ–‰์„ฑ์ธ ์ง€๊ตฌ๋ฅผ ๊ณต์ „ํ•˜๋Š” ํ–‰์„ฑ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
02:26
And so in our solar system, we have a
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ ํƒœ์–‘๊ณ„์—๋Š”
02:29
number of planets, of which Earth is one.
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์ˆ˜๋งŽ์€ ํ–‰์„ฑ์ด ์žˆ๋Š”๋ฐ, ๊ทธ ์ค‘ ํ•˜๋‚˜๊ฐ€ ์ง€๊ตฌ์ž…๋‹ˆ๋‹ค.
02:32
And I think it contains the moon
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๊ทธ๋ฆฌ๊ณ  ๋‚ด ์ƒ๊ฐ์—๋Š” ๋‹ฌ๋„ ํฌํ•จ๋˜์–ด
02:34
as well, but definitely a solar system.
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์žˆ์ง€๋งŒ ํ™•์‹คํžˆ ํƒœ์–‘๊ณ„๊ฐ€ ํฌํ•จ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
02:37
The planets are in orbit because of
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ํ–‰์„ฑ์€
02:41
the sun's gravitational pull, because of gravity.
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์ค‘๋ ฅ ๋•Œ๋ฌธ์— ํƒœ์–‘์˜ ์ค‘๋ ฅ ๋•Œ๋ฌธ์— ๊ถค๋„์— ์žˆ์Šต๋‹ˆ๋‹ค.
02:46
Remember, this isn't a science lesson, though.
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ํ•˜์ง€๋งŒ ์ด๊ฒƒ์€ ๊ณผํ•™ ์ˆ˜์—…์ด ์•„๋‹ˆ๋ผ๋Š” ์ ์„ ๊ธฐ์–ตํ•˜์‹ญ์‹œ์˜ค.
02:48
If I get some things wrong, please excuse me.
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์ œ๊ฐ€ ํ‹€๋ฆฐ ๋ถ€๋ถ„์ด ์žˆ๋‹ค๋ฉด ์–‘ํ•ดํ•ด ์ฃผ์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.
02:51
You should always look things up yourself as well
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02:54
if it sounds like sketchy science to you.
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๊ทธ๊ฒƒ์ด ๋‹น์‹ ์—๊ฒŒ ๋Œ€๋žต์ ์ธ ๊ณผํ•™์ฒ˜๋Ÿผ ๋“ค๋ฆฌ๋ฉด ํ•ญ์ƒ ์Šค์Šค๋กœ ์กฐ์‚ฌํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
02:57
An astronomer is a person who observes space
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์ฒœ๋ฌธํ•™์ž๋Š” ์šฐ์ฃผ
03:01
and stars and the sun and moon.
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์™€ ๋ณ„, ํ•ด์™€ ๋‹ฌ์„ ๊ด€์ฐฐํ•˜๋Š” ์‚ฌ๋žŒ์ด๋‹ค.
03:03
An astronomer is someone who looks up into the
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์ฒœ๋ฌธํ•™์ž๋Š” ํ•˜๋Š˜์„ ์˜ฌ๋ ค๋‹ค๋ณด๋Š” ์‚ฌ๋žŒ์ž…๋‹ˆ๋‹ค.
03:07
sky maybe they study the rotation of planets.
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์–ด์ฉŒ๋ฉด ํ–‰์„ฑ์˜ ํšŒ์ „์„ ์—ฐ๊ตฌํ•˜๋Š” ์‚ฌ๋žŒ์ผ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
03:11
Maybe they study the orbits of planets or comets.
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์–ด์ฉŒ๋ฉด ๊ทธ๋“ค์€ ํ–‰์„ฑ์ด๋‚˜ ํ˜œ์„ฑ์˜ ๊ถค๋„๋ฅผ ์—ฐ๊ตฌํ•  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
03:15
But an astronomer is definitely someone who regularly looks up
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ํ•˜์ง€๋งŒ ์ฒœ๋ฌธํ•™์ž๋Š” ๋ถ„๋ช…ํžˆ ์ •๊ธฐ์ ์œผ๋กœ ๋ฐคํ•˜๋Š˜์„ ์˜ฌ๋ ค๋‹ค๋ณด๊ณ 
03:20
into the night sky and studies the night sky.
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๋ฐคํ•˜๋Š˜์„ ์—ฐ๊ตฌํ•˜๋Š” ์‚ฌ๋žŒ์ž…๋‹ˆ๋‹ค.
03:22
I admire astronomers because they can stay up
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๋‚˜๋Š” ์ฒœ๋ฌธํ•™์ž๋“ค์ด
03:27
late and not be tired the next day.
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๋Šฆ๊ฒŒ๊นŒ์ง€ ์ž์ง€ ์•Š๊ณ  ๋‹ค์Œ๋‚  ํ”ผ๊ณคํ•˜์ง€ ์•Š๊ธฐ ๋•Œ๋ฌธ์— ์กด๊ฒฝํ•œ๋‹ค.
03:29
It must be hard to be an astronomer because you
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03:32
spend most of your time looking at the night sky
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๋Œ€๋ถ€๋ถ„์˜ ์‹œ๊ฐ„์„ ๋ฐค์— ๋ฐคํ•˜๋Š˜์„ ๋ฐ”๋ผ๋ณด๋ฉฐ ๋ณด๋‚ด์„œ
03:36
at night, so you're not sleeping at that time.
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๊ทธ ์‹œ๊ฐ„์— ์ž ์„ ์ž์ง€ ์•Š๊ธฐ ๋•Œ๋ฌธ์— ์ฒœ๋ฌธํ•™์ž๊ฐ€ ๋˜๊ธฐ๋Š” ์–ด๋ ค์šธ ๊ฒƒ ๊ฐ™์•„์š”.
03:40
The field that an astronomer
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์ฒœ๋ฌธํ•™์ž๊ฐ€
03:41
works in is called astronomy.
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์ผํ•˜๋Š” ๋ถ„์•ผ๋ฅผ ์ฒœ๋ฌธํ•™์ด๋ผ๊ณ  ํ•ฉ๋‹ˆ๋‹ค.
03:43
So astronomy, then, is the act of
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๊ทธ๋Ÿฌ๋ฏ€๋กœ ์ฒœ๋ฌธํ•™์€
03:47
looking at the night sky regularly.
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๋ฐคํ•˜๋Š˜์„ ์ •๊ธฐ์ ์œผ๋กœ ๋ณด๋Š” ํ–‰์œ„์ž…๋‹ˆ๋‹ค.
03:49
You can be an amateur
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๋‹น์‹ ์€ ์•„๋งˆ์ถ”์–ด ์ฒœ๋ฌธํ•™์ž๊ฐ€ ๋  ์ˆ˜๋„
03:50
astronomer or a professional astronomer.
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์žˆ๊ณ , ์ „๋ฌธ ์ฒœ๋ฌธํ•™์ž๊ฐ€ ๋  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
03:53
You might own a small telescope and go out
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๋‹น์‹ ์€ ์ž‘์€ ๋ง์›๊ฒฝ์„ ๊ฐ€์ง€๊ณ 
03:57
into your backyard at night, and you are an
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๋ฐค์— ๋’ท๋งˆ๋‹น์œผ๋กœ ๋‚˜๊ฐˆ ์ˆ˜๋„ ์žˆ๊ณ ,
03:59
amateur astronomer, but you still are studying.
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์•„๋งˆ์ถ”์–ด ์ฒœ๋ฌธํ•™์ž์ด์ง€๋งŒ ์—ฌ์ „ํžˆ ๊ณต๋ถ€ํ•˜๊ณ  ์žˆ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
04:02
You are doing astronomy, or you might get paid for it.
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๋‹น์‹ ์€ ์ฒœ๋ฌธํ•™์„ ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๊ทธ๋ ‡์ง€ ์•Š์œผ๋ฉด ๊ทธ์— ๋Œ€ํ•œ ๋Œ€๊ฐ€๋ฅผ ๋ฐ›์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
04:05
Maybe you work for a large university and
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์–ด์ฉŒ๋ฉด ๋‹น์‹ ์€ ํฐ ๋Œ€ํ•™์—์„œ ์ผํ•˜๊ณ 
04:09
you are paid to study the night sky.
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๋ฐคํ•˜๋Š˜์„ ์—ฐ๊ตฌํ•˜๊ธฐ ์œ„ํ•ด ๊ธ‰์—ฌ๋ฅผ ๋ฐ›์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
04:11
That would be a really cool job.
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์ •๋ง ๋ฉ‹์ง„ ์ผ์ด๊ฒ ์ฃ .
04:15
And, of course, you would need a telescope.
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๊ทธ๋ฆฌ๊ณ  ๋ฌผ๋ก  ๋ง์›๊ฒฝ์ด ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.
04:17
There are many different kinds of telescopes.
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๋ง์›๊ฒฝ์—๋Š” ๋‹ค์–‘ํ•œ ์ข…๋ฅ˜๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
04:20
As a kid, I had a really cheap telescope.
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์–ด๋ ธ์„ ๋•Œ ๋‚˜๋Š” ์ •๋ง ๊ฐ’์‹ผ ๋ง์›๊ฒฝ์„ ๊ฐ€์ง€๊ณ  ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค.
04:23
It was good for maybe looking at the moon.
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๋‹ฌ์„ ๋ณด๊ธฐ์—๋„ ์ข‹์•˜์„ ๊ฒƒ ๊ฐ™์•„์š”.
04:26
It wasn't good for looking at much else than that.
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๊ทธ ์™ธ์— ๋‹ค๋ฅธ ๊ฒƒ์„ ๋ณด๋Š” ๊ฒƒ์€ ์ข‹์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.
04:29
But a telescope is a tube with lenses
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๊ทธ๋Ÿฌ๋‚˜ ๋ง์›๊ฒฝ์€ ๋ Œ์ฆˆ๊ฐ€ ๋“ค์–ด ์žˆ๋Š” ํŠœ๋ธŒ์ด๋ฉฐ
04:33
in it, and because of the arrangement of
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, ๋ Œ์ฆˆ ๋ฐฐ์—ด๋กœ ์ธํ•ด
04:36
the lenses, it allows you to see further.
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๋” ๋ฉ€๋ฆฌ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
04:40
Binoculars work on the same principle.
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์Œ์•ˆ๊ฒฝ์€ ๋™์ผํ•œ ์›๋ฆฌ๋กœ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค.
04:42
That's my little binocular example.
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์ด๊ฒƒ์ด ๋‚˜์˜ ์ž‘์€ ์Œ์•ˆ๊ฒฝ ์˜ˆ์ž…๋‹ˆ๋‹ค.
04:45
But, yeah, a telescope has an eyepiece, and
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ํ•˜์ง€๋งŒ, ๋„ค, ๋ง์›๊ฒฝ์—๋Š” ์ ‘์•ˆ๋ Œ์ฆˆ๊ฐ€ ์žˆ๊ณ 
04:48
you basically use the telescope to look at
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๊ธฐ๋ณธ์ ์œผ๋กœ ๋ง์›๊ฒฝ์„ ์‚ฌ์šฉํ•˜์—ฌ
04:51
things that are very, very far away.
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๋งค์šฐ ๋ฉ€๋ฆฌ ์žˆ๋Š” ๋ฌผ์ฒด๋ฅผ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
04:54
So, of course, things like the moon or stars or
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๊ทธ๋ž˜์„œ ๋ฌผ๋ก  ์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์€ํ•˜๊ณ„์˜ ๋‹ฌ์ด๋‚˜ ๋ณ„, ์šฐ์ฃผ
04:58
other things in the universe, in the galaxy that we
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์˜ ๋‹ค๋ฅธ ๊ฒƒ๋“ค์€
05:02
live in are fun to look at with a telescope.
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๋ง์›๊ฒฝ์œผ๋กœ ๋ณด๋Š” ๊ฒƒ์ด ์žฌ๋ฏธ์žˆ์Šต๋‹ˆ๋‹ค.
05:05
I'm trying to use words that I'm going to talk about,
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์ œ๊ฐ€ ์ด์•ผ๊ธฐํ•  ๋‹จ์–ด๋„,
05:09
as well as the words that I am talking about.
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์ œ๊ฐ€ ์ด์•ผ๊ธฐํ•  ๋‹จ์–ด๋„ ์‚ฌ์šฉํ•˜๋ ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค.
05:12
An observatory.
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์ „๋ง๋Œ€.
05:13
So an observatory is a special place that's built.
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๊ทธ๋ž˜์„œ ์ „๋ง๋Œ€๋Š” ์ง€์–ด์ง„ ํŠน๋ณ„ํ•œ ์žฅ์†Œ์ž…๋‹ˆ๋‹ค.
05:17
One moment here, I just have to pull up something.
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์—ฌ๊ธฐ์„œ ์ž ์‹œ๋งŒ ๋ญ”๊ฐ€๋ฅผ ๋ฝ‘์•„์•ผ ํ•ฉ๋‹ˆ๋‹ค.
05:22
An observatory is a special building
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์ฒœ๋ฌธ๋Œ€๋Š”
05:25
built to house a telescope.
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๋ง์›๊ฒฝ์„ ๋ณด๊ด€ํ•˜๊ธฐ ์œ„ํ•ด ์ง€์–ด์ง„ ํŠน๋ณ„ํ•œ ๊ฑด๋ฌผ์ž…๋‹ˆ๋‹ค.
05:28
So when we have a building that has something
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๊ทธ๋ž˜์„œ ๊ฑด๋ฌผ
05:30
in it, you can use the word house.
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์•ˆ์— ๋ญ”๊ฐ€๊ฐ€ ๋“ค์–ด ์žˆ์œผ๋ฉด ์ง‘์ด๋ผ๋Š” ๋‹จ์–ด๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
05:32
So notice it's pronounced different than house, though.
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ํ•˜์ง€๋งŒ ์ง‘๊ณผ๋Š” ๋ฐœ์Œ์ด ๋‹ค๋ฅด๋‹ค๋Š” ์ ์— ์œ ์˜ํ•˜์„ธ์š”.
05:35
So it's used to house a telescope.
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๊ทธ๋ž˜์„œ ๋ง์›๊ฒฝ์„ ๋ณด๊ด€ํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.
05:38
And then the doors can open at night, and it
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๊ทธ๋ฆฌ๊ณ  ๋ฌธ์€ ๋ฐค์— ์—ด๋ฆด ์ˆ˜๋„ ์žˆ๊ณ ,
05:41
can rotate, and the telescope can point in different directions.
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ํšŒ์ „ํ•  ์ˆ˜๋„ ์žˆ๊ณ , ๋ง์›๊ฒฝ์ด ๋‹ค๋ฅธ ๋ฐฉํ–ฅ์„ ๊ฐ€๋ฆฌํ‚ฌ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
05:46
I think a lot of telescopes are located in very
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๋‚ด ์ƒ๊ฐ์—” ๋งŽ์€ ๋ง์›๊ฒฝ์ด ์•„์ฃผ
05:49
dark places or also very close to the equator.
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์–ด๋‘์šด ๊ณณ์— ์žˆ๊ฑฐ๋‚˜ ์ ๋„์— ์•„์ฃผ ๊ฐ€๊นŒ์šด ๊ณณ์— ์œ„์น˜ํ•ด ์žˆ๋Š” ๊ฒƒ ๊ฐ™์•„์š”.
05:53
Don't quote me on that again.
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๋‹ค์‹œ๋Š” ๋‚ด ๋ง์„ ์ธ์šฉํ•˜์ง€ ๋งˆ์„ธ์š”.
05:55
Sometimes I say things and they might not
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๊ฐ€๋” ๋‚ด๊ฐ€ ํ•˜๋Š” ๋ง์€ ์‚ฌ์‹ค์ด ์•„๋‹ ์ˆ˜๋„
06:01
be true, but when I watch movies, often
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์žˆ์ง€๋งŒ, ์˜ํ™”๋ฅผ ๋ณด๋ฉด
06:04
telescopes are located near the equator.
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๋ง์›๊ฒฝ์ด ์ ๋„ ๊ทผ์ฒ˜์— ์žˆ๋Š” ๊ฒฝ์šฐ๊ฐ€ ๋งŽ๋‹ค.
06:07
Maybe I'm wrong about that.
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์–ด์ฉŒ๋ฉด ๋‚ด๊ฐ€ ํ‹€๋ ธ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
06:08
You guys should look that one up.
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๋„ˆํฌ๋“ค์€ ๊ทธ๊ฑธ ์ฐพ์•„ ๋ด์•ผ ํ•ด.
06:10
But anyways, an observatory is something that has a
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ํ•˜์ง€๋งŒ ์–ด์จŒ๋“  ์ฒœ๋ฌธ๋Œ€๋Š”
06:13
gigantic telescope in it, and people can use that
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๊ทธ ์•ˆ์— ๊ฑฐ๋Œ€ํ•œ ๋ง์›๊ฒฝ์ด ์žˆ๋Š” ๊ณณ์ด๊ณ , ์‚ฌ๋žŒ๋“ค์€ ๊ทธ
06:17
telescope to look at things in the night sky.
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๋ง์›๊ฒฝ์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฐคํ•˜๋Š˜์— ์žˆ๋Š” ๊ฒƒ๋“ค์„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
06:21
And, of course, if we send people
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๊ทธ๋ฆฌ๊ณ  ๋ฌผ๋ก  ์šฐ๋ฆฌ๊ฐ€ ์‚ฌ๋žŒ์„
06:23
into space, we call them astronauts.
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์šฐ์ฃผ๋กœ ๋ณด๋‚ธ๋‹ค๋ฉด ์šฐ๋ฆฌ๋Š” ๊ทธ๋“ค์„ ์šฐ์ฃผ๋น„ํ–‰์‚ฌ๋ผ๊ณ  ๋ถ€๋ฆ…๋‹ˆ๋‹ค.
06:26
So an astronaut is a person who has gone up in
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๊ทธ๋Ÿฌ๋‹ˆ๊นŒ ์šฐ์ฃผ ๋น„ํ–‰์‚ฌ๋ž€
06:29
a rocket or a shuttle and has made it to the
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๋กœ์ผ“์ด๋‚˜ ์…”ํ‹€์„ ํƒ€๊ณ 
06:33
edge of the earth's atmosphere, and they are in space, okay?
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์ง€๊ตฌ ๋Œ€๊ธฐ๊ถŒ ๊ฐ€์žฅ์ž๋ฆฌ๊นŒ์ง€ ์˜ฌ๋ผ๊ฐ„ ์‚ฌ๋žŒ์ด๊ณ , ์šฐ์ฃผ์— ์žˆ๋Š” ์‚ฌ๋žŒ์ด์ฃ , ๊ทธ๋ ‡์ฃ ?
06:37
So when they are in space, they
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๊ทธ๋ž˜์„œ ์šฐ์ฃผ์— ์žˆ์„ ๋•Œ๋Š”
06:40
need to wear a special suit.
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ํŠน๋ณ„ํ•œ ์˜ท์„ ์ž…์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
06:41
They need to wear a spacesuit. What a great name.
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๊ทธ๋“ค์€ ์šฐ์ฃผ๋ณต์„ ์ž…์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ •๋ง ์ข‹์€ ์ด๋ฆ„์ž…๋‹ˆ๋‹ค.
06:44
A spacesuit helps protect them, because when
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์šฐ์ฃผ๋ณต์€ ๊ทธ๋“ค์„ ๋ณดํ˜ธํ•˜๋Š” ๋ฐ ๋„์›€์ด ๋ฉ๋‹ˆ๋‹ค. ์™œ๋ƒํ•˜๋ฉด
06:47
you are in space, there's no air.
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์šฐ์ฃผ์—๋Š” ๊ณต๊ธฐ๊ฐ€ ์—†๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
06:49
There's literally nothing.
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๋ง ๊ทธ๋Œ€๋กœ ์•„๋ฌด๊ฒƒ๋„ ์—†์Šต๋‹ˆ๋‹ค.
06:51
Well, almost nothing.
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๊ธ€์Ž„์š”, ๊ฑฐ์˜ ์•„๋ฌด๊ฒƒ๋„ ์•„๋‹™๋‹ˆ๋‹ค. ์šฐ์ฃผ์—๋Š”
06:53
There's always a little bit of cosmic dust
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ํ•ญ์ƒ ์•ฝ๊ฐ„์˜ ์šฐ์ฃผ ๋จผ์ง€
06:56
or something in space, but there's basically nothing.
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๋‚˜ ๋ญ”๊ฐ€๊ฐ€ ์žˆ์ง€๋งŒ ๊ธฐ๋ณธ์ ์œผ๋กœ๋Š” ์•„๋ฌด๊ฒƒ๋„ ์—†์Šต๋‹ˆ๋‹ค.
06:59
Space is a vacuum.
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์šฐ์ฃผ๋Š” ์ง„๊ณต์ด๋‹ค.
07:00
There's no air, there's no oxygen.
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๊ณต๊ธฐ๋„ ์—†๊ณ  ์‚ฐ์†Œ๋„ ์—†์Šต๋‹ˆ๋‹ค.
07:03
So you need to wear a protective suit to
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๊ทธ๋Ÿฌ๋ฏ€๋กœ
07:05
protect your body and to help you breathe.
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๋ชธ์„ ๋ณดํ˜ธํ•˜๊ณ  ํ˜ธํก์„ ๋•๊ธฐ ์œ„ํ•ด ๋ณดํ˜ธ๋ณต์„ ์ฐฉ์šฉํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
07:08
So astronauts regularly go up to
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๊ทธ๋ž˜์„œ ์šฐ์ฃผ๋น„ํ–‰์‚ฌ๋“ค์€ ์ •๊ธฐ์ ์œผ๋กœ
07:11
things like the space station.
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์šฐ์ฃผ์ •๊ฑฐ์žฅ ๊ฐ™์€ ๊ณณ์œผ๋กœ ์˜ฌ๋ผ๊ฐ‘๋‹ˆ๋‹ค.
07:13
They need to wear their spacesuit
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๊ทธ๋“ค์€ ๊ฑฐ๊ธฐ์— ์žˆ์„ ๋•Œ ์šฐ์ฃผ๋ณต์„ ์ž…์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค
07:14
when they are up there.
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.
07:16
And so I mentioned rocket and shuttle.
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๊ทธ๋ž˜์„œ ์ €๋Š” ๋กœ์ผ“๊ณผ ์…”ํ‹€์„ ์–ธ๊ธ‰ํ–ˆ์Šต๋‹ˆ๋‹ค.
07:20
So a rocket is, of course, a vehicle
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๋กœ์ผ“์€ ๋ฌผ๋ก 
07:22
that you use to get to space.
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์šฐ์ฃผ๋กœ ๊ฐ€๋Š” ๋ฐ ์‚ฌ์šฉํ•˜๋Š” ์ฐจ๋Ÿ‰์ž…๋‹ˆ๋‹ค.
07:25
A rocket sits on a launch
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๋กœ์ผ“์ด ๋ฐœ์‚ฌ๋Œ€์— ๋†“์—ฌ
07:27
pad, and there's usually a Countdown.
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์žˆ๊ณ  ์ผ๋ฐ˜์ ์œผ๋กœ ์นด์šดํŠธ๋‹ค์šด์ด ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค.
07:29
Ten, 987-654-3210 blast off.
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10, 987-654-3210์ด ํญ๋ฐœํ•ฉ๋‹ˆ๋‹ค.
07:33
That's what I used to say as a kid.
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์ œ๊ฐ€ ์–ด๋ ธ์„ ๋•Œ ์ด๋Ÿฐ ๋ง์„ ํ•˜๊ณค ํ–ˆ์Šต๋‹ˆ๋‹ค.
07:34
The engines.
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์—”์ง„.
07:36
The rocket engines will ignite, and they have enough
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๋กœ์ผ“ ์—”์ง„์ด ์ ํ™”๋˜๊ณ 
07:39
thrust to make it so the rocket can travel
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๋กœ์ผ“์ด ์ง€๊ตฌ ๋Œ€๊ธฐ๊ถŒ์—์„œ ์šฐ์ฃผ๋กœ ์ด๋™ํ•  ์ˆ˜ ์žˆ์„ ๋งŒํผ ์ถฉ๋ถ„ํ•œ ์ถ”๋ ฅ์ด ์žˆ์Šต๋‹ˆ๋‹ค
07:43
up out of the Earth's atmosphere into space.
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.
07:47
Very, very cool.
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์•„์ฃผ ์•„์ฃผ ๋ฉ‹์ง€๋„ค์š”.
07:48
A space shuttle is very similar, except that a
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์šฐ์ฃผ ์™•๋ณต์„ ์€
07:51
space shuttle usually looks more like an airplane, at
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์šฐ์ฃผ๋กœ ๊ฐ”๋‹ค๊ฐ€
07:54
least one part of it, because it can return
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๋Œ์•„์™€์„œ ์ฐฉ๋ฅ™ํ•  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ์ผ๋ฐ˜์ ์œผ๋กœ ์ ์–ด๋„ ์ผ๋ถ€ ๋ถ€๋ถ„์ด ๋น„ํ–‰๊ธฐ์™€ ๋” ๋น„์Šทํ•ด ๋ณด์ธ๋‹ค๋Š” ์ ์„ ์ œ์™ธํ•˜๋ฉด ๋งค์šฐ ์œ ์‚ฌํ•ฉ๋‹ˆ๋‹ค
07:57
and land after it has gone to space.
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.
08:02
But, of course, now SpaceX has rockets that can land.
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ํ•˜์ง€๋งŒ ๋ฌผ๋ก  ์ด์ œ SpaceX์—๋Š” ์ฐฉ๋ฅ™ํ•  ์ˆ˜ ์žˆ๋Š” ๋กœ์ผ“์ด ์žˆ์Šต๋‹ˆ๋‹ค.
08:06
It took them a while to figure that out, but
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๊ทธ ์‚ฌ์‹ค์„ ์•Œ์•„๋‚ด๋Š” ๋ฐ๋Š” ์‹œ๊ฐ„์ด ์ข€ ๊ฑธ๋ ธ์ง€๋งŒ,
08:09
they have rockets that can land after going to space.
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๊ทธ๋“ค์€ ์šฐ์ฃผ๋กœ ๊ฐ”๋‹ค๊ฐ€ ์ฐฉ๋ฅ™ํ•  ์ˆ˜ ์žˆ๋Š” ๋กœ์ผ“์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
08:12
So rockets have become reusable as well.
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๊ทธ๋ž˜์„œ ๋กœ์ผ“๋„ ์žฌ์‚ฌ์šฉ์ด ๊ฐ€๋Šฅํ•ด์กŒ์Šต๋‹ˆ๋‹ค.
08:15
So space shuttle and rocket.
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๊ทธ๋ž˜์„œ ์šฐ์ฃผ ์™•๋ณต์„ ๊ณผ ๋กœ์ผ“.
08:19
A black hole.
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๋ธ”๋ž™ํ™€.
08:20
So my understanding is that a black hole is
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๊ทธ๋ž˜์„œ ์ œ๊ฐ€ ์ดํ•ดํ•œ ๋ฐ”์— ๋”ฐ๋ฅด๋ฉด ๋ธ”๋ž™ํ™€์€
08:25
something in space where it has so much gravity
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์ค‘๋ ฅ์ด ๋„ˆ๋ฌด ์ปค์„œ
08:28
that it pulls everything around it in, including light.
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๋น›์„ ํฌํ•จํ•˜์—ฌ ์ฃผ๋ณ€์˜ ๋ชจ๋“  ๊ฒƒ์„ ๋Œ์–ด๋‹น๊ธฐ๋Š” ์šฐ์ฃผ ๊ณต๊ฐ„์— ์žˆ๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
08:33
So a little bit hard to understand, but you
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๊ทธ๋ž˜์„œ ์กฐ๊ธˆ ์ดํ•ดํ•˜๊ธฐ ์–ด๋ ต์ง€๋งŒ
08:35
might hear about this if you read a science
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SF ์†Œ์„ค์„ ์ฝ๊ฑฐ๋‚˜ SF TV ์‡ผ๋ฅผ ์‹œ์ฒญํ•œ๋‹ค๋ฉด ์ด์— ๋Œ€ํ•ด ๋“ค์„ ์ˆ˜ ์žˆ์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค
08:38
fiction novel or watch a science fiction tv show.
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.
08:42
When a spaceship gets close to a
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์šฐ์ฃผ์„ ์ด ๋ธ”๋ž™ํ™€์— ๊ฐ€๊นŒ์ด ๋‹ค๊ฐ€๊ฐ€๋ฉด
08:43
black hole, it gets sucked in.
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๋นจ๋ ค๋“ค์–ด๊ฐ€๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
08:45
That's the term.
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๊ทธ๋Ÿฐ ์šฉ์–ด์ž…๋‹ˆ๋‹ค.
08:48
The black hole is pulling us in, captain.
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๋ธ”๋ž™ํ™€์ด ์šฐ๋ฆฌ๋ฅผ ๋Œ์–ด๋‹น๊ธฐ๊ณ  ์žˆ์–ด์š”, ์„ ์žฅ๋‹˜.
08:50
You'll hear them say that, or put the engines on full,
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08:54
because the gravity of the black hole is pulling us in.
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๋ธ”๋ž™ํ™€์˜ ์ค‘๋ ฅ์ด ์šฐ๋ฆฌ๋ฅผ ๋Œ์–ด๋‹น๊ธฐ๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๊ทธ๋“ค์ด ๊ทธ๋ ‡๊ฒŒ ๋งํ•˜๋Š” ๊ฒƒ์„ ๋“ฃ๊ฑฐ๋‚˜ ์—”์ง„์„ ์ตœ๋Œ€๋กœ ์ผœ๋Š” ๊ฒƒ์„ ๋“ฃ๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
08:57
So you don't have to fully understand what a black
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๋”ฐ๋ผ์„œ ๋ธ”๋ž™ํ™€์ด ๋ฌด์—‡์ธ์ง€ ์™„์ „ํžˆ ์ดํ•ดํ•  ํ•„์š”๋Š” ์—†์Šต๋‹ˆ๋‹ค.
09:01
hole is, except that it's dangerous if you're in space
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์šฐ์ฃผ์—์„œ
09:04
and you are in a spaceship, the sun.
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๋‹น์‹ ์€ ์šฐ์ฃผ์„ , ํƒœ์–‘์— ์žˆ์Šต๋‹ˆ๋‹ค.
09:08
So the sun, as most of you know, is actually a star.
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๊ทธ๋ž˜์„œ ์—ฌ๋Ÿฌ๋ถ„ ๋Œ€๋ถ€๋ถ„์ด ์•Œ๊ณ  ์žˆ๋“ฏ์ด ํƒœ์–‘์€ ์‹ค์ œ๋กœ ๋ณ„์ž…๋‹ˆ๋‹ค.
09:13
It just happens to be our star.
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์šฐ์—ฐํžˆ๋„ ์šฐ๋ฆฌ์˜ ๋ณ„์ด ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.
09:14
And so the sun is a giant ball of fusion.
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๊ทธ๋ž˜์„œ ํƒœ์–‘์€ ๊ฑฐ๋Œ€ํ•œ ํ•ต์œตํ•ฉ ๊ณต์ž…๋‹ˆ๋‹ค.
09:19
I think it is generating heat and light.
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์—ด๊ณผ ๋น›์„ ๋ฐœ์ƒ์‹œํ‚ค๋Š” ๊ฒƒ ๊ฐ™์•„์š”.
09:22
If it wasn't for the sun, there
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ํƒœ์–‘์ด ์—†์—ˆ๋‹ค๋ฉด
09:24
would be no life on Earth.
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์ง€๊ตฌ์ƒ์— ์ƒ๋ช…์ฒด๋„ ์—†์—ˆ์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
09:26
We rely heavily on the sun to keep our
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์šฐ๋ฆฌ๋Š” ์ง€๊ตฌ๋ฅผ ๋”ฐ๋œปํ•˜๊ฒŒ ์œ ์ง€ํ•˜๊ณ  ๋‚ฎ๊ณผ ๋ฐค์˜ ์ฃผ๊ธฐ๋ฅผ ์œ ์ง€ํ•˜๊ธฐ ์œ„ํ•ด ํƒœ์–‘์— ํฌ๊ฒŒ ์˜์กดํ•ฉ๋‹ˆ๋‹ค
09:29
planet warm and for our day night cycle.
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.
09:33
So in order for us to have daytime and
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๊ทธ๋ž˜์„œ ์ง€๊ตฌ๊ฐ€ ์ž์ „ํ•จ์— ๋”ฐ๋ผ ์šฐ๋ฆฌ๊ฐ€ ๋‚ฎ๊ณผ
09:36
nighttime as the Earth turns, we are either facing
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๋ฐค์„ ๊ฐ€์ง€๊ธฐ ์œ„ํ•ด์„œ๋Š” ์šฐ๋ฆฌ๋Š”
09:40
the sun or facing away from the sun.
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ํƒœ์–‘์„ ํ–ฅํ•˜๊ณ  ์žˆ๊ฑฐ๋‚˜ ํƒœ์–‘์œผ๋กœ๋ถ€ํ„ฐ ๋ฉ€์–ด์ง€๋Š” ๋ฐฉํ–ฅ์„ ํ–ฅํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
09:43
And so this is what helps our crops grow.
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์ด๊ฒƒ์ด ๋ฐ”๋กœ ์šฐ๋ฆฌ ๋†์ž‘๋ฌผ์ด ์ž๋ผ๋Š” ๋ฐ ๋„์›€์ด ๋˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
09:46
This is what helps us get vitamin D.
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์ด๊ฒƒ์ด ์šฐ๋ฆฌ๊ฐ€ ๋น„ํƒ€๋ฏผ D๋ฅผ ์–ป๋Š” ๋ฐ ๋„์›€์ด ๋˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
09:48
So when I go outside and I go for a walk,
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๊ทธ๋ž˜์„œ ๋ฐ–์— ๋‚˜๊ฐ€ ์‚ฐ์ฑ…์„ ํ•  ๋•Œ
09:51
sunlight on my skin helps me to get vitamin D.
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ํ”ผ๋ถ€์— ๋‹ฟ๋Š” ํ–‡๋น›์€ ๋น„ํƒ€๋ฏผ D๋ฅผ ์–ป๋Š” ๋ฐ ๋„์›€์ด ๋ฉ๋‹ˆ๋‹ค.
09:54
It's just basically even the oil we get out
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๊ธฐ๋ณธ์ ์œผ๋กœ ์šฐ๋ฆฌ๊ฐ€
09:58
of the ground is in some way stored sunlight.
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๋•…์—์„œ ๋‚˜์˜ค๋Š” ๊ธฐ๋ฆ„๋„ ์–ด๋–ค ๋ฐฉ์‹์œผ๋กœ๋“  ํ–‡๋น›์— ์ €์žฅ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค. .
10:01
Did you know that?
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๋‹น์‹ ์€ ์•Œ๊ณ  ๊ณ„์‹ญ๋‹ˆ๊นŒ?
10:03
And then we have the moon, and we have stars.
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๊ทธ๋ฆฌ๊ณ  ์šฐ๋ฆฌ์—๊ฒŒ๋Š” ๋‹ฌ์ด ์žˆ๊ณ  ๋ณ„์ด ์žˆ์Šต๋‹ˆ๋‹ค.
10:06
The moon is, of course, our friend in the sky at night.
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๋ฌผ๋ก  ๋‹ฌ์€ ๋ฐคํ•˜๋Š˜์— ๋–  ์žˆ๋Š” ์šฐ๋ฆฌ์˜ ์นœ๊ตฌ์ž…๋‹ˆ๋‹ค.
10:09
That's what I remember from a children's book that
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10:11
I read when I was really, really young.
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์ œ๊ฐ€ ์ •๋ง ์–ด๋ ธ์„ ๋•Œ ์ฝ์€ ๋™ํ™”์ฑ…์—์„œ ๊ธฐ์–ต๋‚˜๋Š” ๊ฒƒ์ด ๋ฐ”๋กœ ์ด๊ฒƒ์ด์—ˆ์Šต๋‹ˆ๋‹ค.
10:13
And the moon doesn't really have an atmosphere.
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๊ทธ๋ฆฌ๊ณ  ๋‹ฌ์—๋Š” ์‹ค์ œ๋กœ ๋Œ€๊ธฐ๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.
10:17
And so when astronauts go to the
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๊ทธ๋ž˜์„œ ์šฐ์ฃผ ๋น„ํ–‰์‚ฌ๋“ค์€ ๋‹ฌ์— ๊ฐˆ ๋•Œ
10:20
moon, they have to wear a spacesuit.
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์šฐ์ฃผ๋ณต์„ ์ž…์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
10:22
And also the moon has a number of craters on it.
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๊ทธ๋ฆฌ๊ณ  ๋‹ฌ์—๋Š” ์ˆ˜๋งŽ์€ ๋ถ„ํ™”๊ตฌ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
10:25
I'll talk about craters in a little bit because
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ํฌ๋ ˆ์ดํ„ฐ๋Š”
10:27
it regularly gets hit by things that leave craters.
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ํฌ๋ ˆ์ดํ„ฐ๋ฅผ ๋‚จ๊ธฐ๋Š” ๊ฒƒ๋“ค์— ์˜ํ•ด ์ •๊ธฐ์ ์œผ๋กœ ํƒ€๊ฒฉ์„ ๋ฐ›๊ธฐ ๋•Œ๋ฌธ์— ํฌ๋ ˆ์ดํ„ฐ์— ๋Œ€ํ•ด ์กฐ๊ธˆ ์ด์•ผ๊ธฐํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.
10:32
By the way, the moon also has phases.
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๊ทธ๋Ÿฐ๋ฐ ๋‹ฌ์—๋„ ์œ„์ƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
10:35
So you can have a full moon, you can
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๊ทธ๋ž˜์„œ ๋ณด๋ฆ„๋‹ฌ์ด ๋œฐ ์ˆ˜๋„ ์žˆ๊ณ ,
10:37
have a half moon, you can have a new
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๋ฐ˜๋‹ฌ์ด ๋œฐ ์ˆ˜๋„ ์žˆ๊ณ , ์ดˆ์Šน๋‹ฌ์ด ๋œฐ ์ˆ˜๋„ ์žˆ๋Š”๋ฐ,
10:40
moon, which is when there's no moon at all.
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์ด๋•Œ๋Š” ๋‹ฌ์ด ์ „ํ˜€ ์—†์„ ๋•Œ์ž…๋‹ˆ๋‹ค.
10:42
But definitely the moon has phases.
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ํ•˜์ง€๋งŒ ํ™•์‹คํžˆ ๋‹ฌ์—๋Š” ์œ„์ƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
10:46
Let me find the official phases of the moon.
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๋‹ฌ์˜ ๊ณต์‹์ ์ธ ์œ„์ƒ์„ ์ฐพ์•„๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค.
10:50
The new moon, the first quarter moon, the full
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์ดˆ์Šน๋‹ฌ, 1๋ถ„๊ธฐ ๋‹ฌ,
10:52
moon, the waxing moon, the third quarter moon.
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๋ณด๋ฆ„๋‹ฌ, ์™์‹ฑ๋‹ฌ, 3๋ถ„๊ธฐ ๋‹ฌ.
10:56
I think you understand what all those mean.
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๋‚˜๋Š” ๋‹น์‹ ์ด ๊ทธ ๋ชจ๋“  ๊ฒƒ์ด ๋ฌด์—‡์„ ์˜๋ฏธํ•˜๋Š”์ง€ ์ดํ•ดํ•œ๋‹ค๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.
10:58
I really like it when there's a full moon because
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๋ณด๋ฆ„๋‹ฌ์ด ๋œจ๋ฉด
11:00
you can see when you go outside at night.
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๋ฐค์— ๋ฐ–์— ๋‚˜๊ฐ€๋ฉด ๋ณผ ์ˆ˜ ์žˆ์–ด์„œ ์ •๋ง ์ข‹์•„์š”.
11:04
And then, of course, we have what are called stars.
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๊ทธ๋ฆฌ๊ณ  ๋ฌผ๋ก  ๋ณ„์ด๋ผ๊ณ  ๋ถˆ๋ฆฌ๋Š” ๊ฒƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
11:08
When you look in the night sky, you see lots of stars.
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๋ฐคํ•˜๋Š˜์„ ๋ณด๋ฉด ์ˆ˜๋งŽ์€ ๋ณ„๋“ค์ด ๋ณด์ž…๋‹ˆ๋‹ค.
11:11
This is what I think makes
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์ด๊ฒƒ์ด ๋ฐ”๋กœ
11:12
the night sky the most enjoyable.
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๋ฐคํ•˜๋Š˜์„ ๊ฐ€์žฅ ์ฆ๊ฒ๊ฒŒ ๋งŒ๋“œ๋Š” ๊ฒƒ์ด๋ผ๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.
11:15
I really like looking up at the stars.
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๋‚˜๋Š” ๋ณ„์„ ์˜ฌ๋ ค๋‹ค๋ณด๋Š” ๊ฑธ ์ •๋ง ์ข‹์•„ํ•ด์š”.
11:18
In fact, when the moon has fully disappeared, it's
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์‚ฌ์‹ค ๋‹ฌ์ด ์™„์ „ํžˆ ์‚ฌ๋ผ์ง€๋ฉด ํ•˜๋Š˜์˜ ๋ณ„๋“ค์„ ๋ชจ๋‘
11:23
really nice because you have a good view of
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์ž˜ ๋ณผ ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ์ •๋ง ์ข‹์•„์š”
11:25
all of the stars in the sky.
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.
11:29
And we also have what's called constellations.
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๊ทธ๋ฆฌ๊ณ  ๋ณ„์ž๋ฆฌ๋ผ๊ณ  ๋ถˆ๋ฆฌ๋Š” ๊ฒƒ๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
11:32
A constellation is a group of stars
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๋ณ„์ž๋ฆฌ๋Š”
11:36
that we think looks like something.
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์šฐ๋ฆฌ๊ฐ€ ๋ฌด์–ธ๊ฐ€์ฒ˜๋Ÿผ ๋ณด์ธ๋‹ค๊ณ  ์ƒ๊ฐํ•˜๋Š” ๋ณ„๋“ค์˜ ๋ฌด๋ฆฌ์ž…๋‹ˆ๋‹ค.
11:39
That's the best way to describe it.
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๊ทธ๊ฒƒ์ด ๊ทธ๊ฒƒ์„ ์„ค๋ช…ํ•˜๋Š” ๊ฐ€์žฅ ์ข‹์€ ๋ฐฉ๋ฒ•์ž…๋‹ˆ๋‹ค.
11:41
Not quite sure if you can see it, but in
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๋ณผ ์ˆ˜ ์žˆ์„์ง€๋Š” ํ™•์‹คํ•˜์ง€ ์•Š์ง€๋งŒ
11:43
the northern hemisphere, we have something called the Big Dipper.
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๋ถ๋ฐ˜๊ตฌ์—๋Š” ๋ถ๋‘์น ์„ฑ์ด๋ผ๋Š” ๊ฒƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
11:48
In this picture, the Big Dipper,
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์ด ์‚ฌ์ง„์—์„œ ๋ถ๋‘์น ์„ฑ์„
11:50
see if you can find it.
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์ฐพ์„ ์ˆ˜ ์žˆ๋Š”์ง€ ๋ณด์„ธ์š”.
11:51
It's kind of sideways.
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์ผ์ข…์˜ ์˜†๋ชจ์Šต์ž…๋‹ˆ๋‹ค.
11:53
It's near this side of the picture.
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์‚ฌ์ง„์˜ ์ด ๊ทผ์ฒ˜์— ์žˆ์Šต๋‹ˆ๋‹ค.
11:56
And it has 123-4567 really bright stars.
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๊ทธ๋ฆฌ๊ณ  123-4567๊ฐœ์˜ ์ •๋ง ๋ฐ์€ ๋ณ„์ด ์žˆ์Šต๋‹ˆ๋‹ค.
12:01
And it looks like a ladle that you would
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๊ทธ๋ฆฌ๊ณ  ๊ทธ๊ฒƒ์€
12:03
use for soup or maybe to drink water.
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์ˆ˜ํ”„๋ฅผ ๋‹ด๊ฑฐ๋‚˜ ๋ฌผ์„ ๋งˆ์‹ค ๋•Œ ์‚ฌ์šฉํ•˜๋Š” ๊ตญ์ž์ฒ˜๋Ÿผ ๋ณด์ž…๋‹ˆ๋‹ค.
12:07
Maybe you would dip some water out.
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์–ด์ฉŒ๋ฉด ๋ฌผ์„ ์ข€ ๋‹ด๊ทธ๋ฉด ๋  ๊ฒƒ ๊ฐ™์Šต๋‹ˆ๋‹ค.
12:09
And the cool thing about the Big Dipper in the
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๊ทธ๋ฆฌ๊ณ  ๋ถ๋ฐ˜๊ตฌ ๋ถ๋‘์น ์„ฑ์˜ ๋ฉ‹์ง„ ์ ์€ ๋ถ๋‘์น ์„ฑ์˜ ์ปต ๋ถ€๋ถ„
12:12
northern hemisphere is the two stars at the far end
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๋งจ ๋์— ์žˆ๋Š” ๋‘ ๊ฐœ์˜ ๋ณ„์ž…๋‹ˆ๋‹ค
12:17
of the cup part of the Big Dipper.
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.
12:20
They line up and they point to the north star,
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๊ทธ๋“ค์€ ์ผ๋ ฌ๋กœ ์„œ์„œ
12:23
which is on the far side of this picture.
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์ด ์‚ฌ์ง„์˜ ๋ฐ˜๋Œ€ํŽธ์— ์žˆ๋Š” ๋ถ๊ทน์„ฑ์„ ๊ฐ€๋ฆฌํ‚ต๋‹ˆ๋‹ค.
12:25
I should have put some arrows, shouldn't I?
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ํ™”์‚ด์„ ์ข€ ๊ฝ‚์•„๋‘์—ˆ์–ด์•ผ ํ–ˆ๋Š”๋ฐ์š”, ๊ทธ๋ ‡์ฃ ?
12:27
Sorry, I should have done that.
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์ฃ„์†กํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋ ‡๊ฒŒ ํ–ˆ์–ด์•ผ ํ–ˆ์–ด์š”.
12:28
But anyways, constellations.
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ํ•˜์ง€๋งŒ ์–ด์จŒ๋“  ๋ณ„์ž๋ฆฌ.
12:31
There's things like Virgo and Orion.
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์ฒ˜๋…€์ž๋ฆฌ์™€ ์˜ค๋ฆฌ์˜จ ๊ฐ™์€ ๊ฒƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
12:35
There's different constellations that we see in the northern
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๋ถ๋ฐ˜๊ตฌ์—๋Š” ๋‹ค์–‘ํ•œ ๋ณ„์ž๋ฆฌ๊ฐ€ ์žˆ๊ณ 
12:39
hemisphere, and you see different ones in the southern
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, ์šฐ๋ฆฌ๋ณด๋‹ค ์•„๋ž˜์— ์žˆ์œผ๋ฉด ๋‚จ๋ฐ˜๊ตฌ์—์„œ๋„ ๋‹ค์–‘ํ•œ ๋ณ„์ž๋ฆฌ๋ฅผ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค
12:41
hemisphere if you are down below us.
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.
12:44
But basically a group of stars
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๊ทธ๋Ÿฌ๋‚˜ ๊ธฐ๋ณธ์ ์œผ๋กœ
12:46
that humans think look like something.
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์ธ๊ฐ„์ด ๋ญ”๊ฐ€์ฒ˜๋Ÿผ ๋ณด์ธ๋‹ค๊ณ  ์ƒ๊ฐํ•˜๋Š” ๋ณ„ ๊ทธ๋ฃน์ž…๋‹ˆ๋‹ค.
12:51
When a planet goes around the
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ํ–‰์„ฑ์ด
12:53
sun, it's called an orbit.
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ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•˜๋Š” ๊ฒƒ์„ ๊ถค๋„๋ผ๊ณ  ํ•ฉ๋‹ˆ๋‹ค.
12:56
When the moon goes around the
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๋‹ฌ์ด ์ง€๊ตฌ ์ฃผ์œ„๋ฅผ ๋„๋Š”
12:57
Earth, that is the moon's orbit.
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๊ฒƒ์ด ๋‹ฌ์˜ ๊ถค๋„์ž…๋‹ˆ๋‹ค.
13:00
So an orbit refers to the path that something
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๋”ฐ๋ผ์„œ ๊ถค๋„๋Š”
13:04
in space follows as it goes around something else.
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์šฐ์ฃผ์— ์žˆ๋Š” ๋ฌผ์ฒด๊ฐ€ ๋‹ค๋ฅธ ๋ฌผ์ฒด๋ฅผ ๋Œ๋ฉด์„œ ๋”ฐ๋ผ๊ฐ€๋Š” ๊ฒฝ๋กœ๋ฅผ ์˜๋ฏธํ•ฉ๋‹ˆ๋‹ค.
13:09
It takes the Earth 365 days to go around the sun.
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์ง€๊ตฌ๊ฐ€ ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๋„๋Š” ๋ฐ๋Š” 365์ผ์ด ๊ฑธ๋ฆฝ๋‹ˆ๋‹ค.
13:12
Actually, I think it's leap year this year.
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์‚ฌ์‹ค ์˜ฌํ•ด๋Š” ์œค๋…„์ธ ๊ฒƒ ๊ฐ™์•„์š”.
13:14
Is it leap year this year?
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์˜ฌํ•ด๋Š” ์œค๋…„์ธ๊ฐ€์š”?
13:15
Might get an extra day this year.
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์˜ฌํ•ด๋Š” ํ•˜๋ฃจ๊ฐ€ ๋” ๋Š˜์–ด๋‚  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
13:17
Someone should check that.
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๋ˆ„๊ตฐ๊ฐ€ ๊ทธ๊ฒƒ์„ ํ™•์ธํ•ด์•ผํ•ฉ๋‹ˆ๋‹ค.
13:19
But, yes, orbit is what determines
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ํ•˜์ง€๋งŒ ๊ทธ๋ ‡์Šต๋‹ˆ๋‹ค. ๊ถค๋„์— ๋”ฐ๋ผ
13:23
the length of our year.
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1๋…„์˜ ๊ธธ์ด๊ฐ€ ๊ฒฐ์ •๋ฉ๋‹ˆ๋‹ค.
13:26
So we orbit around the sun.
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ๋Š” ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•ฉ๋‹ˆ๋‹ค.
13:31
Just checking.
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๊ทธ๋ƒฅ ํ™•์ธํ•˜๋Š” ์ค‘์ด์—์š”.
13:34
Sometimes during the lesson, I get curious.
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๊ฐ€๋” ์ˆ˜์—…์„ ํ•˜๋‹ค๊ฐ€ ๊ถ๊ธˆํ•ด์งˆ ๋•Œ๊ฐ€ ์žˆ์–ด์š”.
13:37
So there's 365.26 days in the Earth's orbit, and that's
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๋”ฐ๋ผ์„œ ์ง€๊ตฌ์˜ ๊ถค๋„์—๋Š” 365.26์ผ์ด ์žˆ์œผ๋ฉฐ, ์ด๊ฒƒ์ด ๋ฐ”๋กœ
13:43
why we need to have leap year every four years.
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์šฐ๋ฆฌ๊ฐ€ 4๋…„๋งˆ๋‹ค ์œค๋…„์„ ๊ฐ€์ ธ์•ผ ํ•˜๋Š” ์ด์œ ์ž…๋‹ˆ๋‹ค.
13:46
And then I was going to check, is it leap year 2024?
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๊ทธ๋Ÿฌ๋‹ค๊ฐ€ ํ™•์ธํ•ด๋ณด๋ ค๊ณ  ํ–ˆ๋Š”๋ฐ, 2024๋…„ ์œค๋…„์ธ๊ฐ€์š”?
13:50
2024 is a leap year. So there you go.
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2024๋…„์€ ์œค๋…„์ด๋‹ค. ๊ทธ๋Ÿผ ๋์–ด์š”.
13:56
I have to teach an extra day, then that's okay.
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ํ•˜๋ฃจ ๋” ๊ฐ€๋ฅด์ณ์•ผ ํ•˜๋Š”๋ฐ, ๊ทธ๋Ÿฌ๋ฉด ๊ดœ์ฐฎ์•„์š”.
14:00
And then I mentioned this before.
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๊ทธ๋ฆฌ๊ณ  ๋‚˜๋Š” ์ด๊ฒƒ์„ ์ „์— ์–ธ๊ธ‰ํ–ˆ์Šต๋‹ˆ๋‹ค.
14:02
There are planets.
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ํ–‰์„ฑ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
14:04
So a planet is definitely not a star.
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๊ทธ๋Ÿฌ๋ฏ€๋กœ ํ–‰์„ฑ์€ ํ™•์‹คํžˆ ๋ณ„์ด ์•„๋‹™๋‹ˆ๋‹ค.
14:08
It's not like our sun, and it's not a moon.
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๊ทธ๊ฒƒ์€ ์šฐ๋ฆฌ์˜ ํƒœ์–‘๊ณผ๋„ ๋‹ค๋ฅด๊ณ , ๋‹ฌ๋„ ์•„๋‹™๋‹ˆ๋‹ค.
14:11
A planet will definitely orbit a star.
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ํ–‰์„ฑ์€ ํ™•์‹คํžˆ ๋ณ„ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
14:14
Our planets orbit the sun.
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์šฐ๋ฆฌ ํ–‰์„ฑ์€ ํƒœ์–‘์„ ๊ณต์ „ํ•ฉ๋‹ˆ๋‹ค.
14:16
And then again, oh, I think I got the order wrong.
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๊ทธ๋ฆฌ๊ณ  ๋˜ ์•„, ์ฃผ๋ฌธ์„ ์ž˜๋ชปํ•œ ๊ฒƒ ๊ฐ™์•„์š”.
14:19
Mercury, Venus, Earth, Mars, Jupiter,
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์ˆ˜์„ฑ, ๊ธˆ์„ฑ, ์ง€๊ตฌ, ํ™”์„ฑ, ๋ชฉ์„ฑ,
14:21
Saturn, Uranus, and then Neptune.
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ํ† ์„ฑ, ์ฒœ์™•์„ฑ, ๊ทธ๋ฆฌ๊ณ  ํ•ด์™•์„ฑ.
14:23
I think I said it the other way for the last two.
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์ง€๋‚œ ๋‘ ์‚ฌ๋žŒ์— ๋Œ€ํ•ด์„œ๋Š” ๋‹ค๋ฅด๊ฒŒ ๋งํ•œ ๊ฒƒ ๊ฐ™์•„์š”.
14:26
Generally, I think a planet has to have an atmosphere
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์ผ๋ฐ˜์ ์œผ๋กœ ํ–‰์„ฑ์ด ํ–‰์„ฑ์œผ๋กœ ๊ฐ„์ฃผ
14:30
of some kind in order to be considered a planet.
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๋˜๋ ค๋ฉด ์–ด๋–ค ์ข…๋ฅ˜์˜ ๋Œ€๊ธฐ๊ฐ€ ์žˆ์–ด์•ผ ํ•œ๋‹ค๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.
14:34
Again, not a science lesson.
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๋‹ค์‹œ ๋งํ•˜์ง€๋งŒ, ๊ณผํ•™ ์ˆ˜์—…์ด ์•„๋‹™๋‹ˆ๋‹ค.
14:35
But planets are large spheres.
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๊ทธ๋Ÿฌ๋‚˜ ํ–‰์„ฑ์€ ํฐ ๊ตฌ์ฒด์ž…๋‹ˆ๋‹ค.
14:39
So a sphere is a big like a ball
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๋”ฐ๋ผ์„œ ๊ตฌ๋Š” ์šฐ์ฃผ์˜ ๊ณต์ฒ˜๋Ÿผ ํฌ๋ฉฐ
14:43
in space, and we live on the planet Earth.
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์šฐ๋ฆฌ๋Š” ํ–‰์„ฑ ์ง€๊ตฌ์— ์‚ด๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
14:47
An asteroid is not a planet.
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์†Œํ–‰์„ฑ์€ ํ–‰์„ฑ์ด ์•„๋‹™๋‹ˆ๋‹ค.
14:50
It's much smaller than a planet.
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ํ–‰์„ฑ๋ณด๋‹ค ํ›จ์”ฌ ์ž‘์Šต๋‹ˆ๋‹ค.
14:52
It's usually just a bunch of rock or ice or metal.
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๋ณดํ†ต์€ ๋‹จ์ง€ ๋ฐ”์œ„๋‚˜ ์–ผ์Œ, ๊ธˆ์† ๋ฉ์–ด๋ฆฌ์ผ ๋ฟ์ž…๋‹ˆ๋‹ค.
14:56
It does orbit the sun.
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๊ทธ๊ฒƒ์€ ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•ฉ๋‹ˆ๋‹ค.
14:58
So we do have an asteroid belt in our solar system.
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ ํƒœ์–‘๊ณ„์—๋Š” ์†Œํ–‰์„ฑ๋Œ€๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
15:02
I think it's out by Saturn or something
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๋‚ด ์ƒ๊ฐ์—” ํ† ์„ฑ ์˜†์ด๋‚˜
15:04
like that, or somewhere out that way.
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๊ทธ์™€ ๋น„์Šทํ•œ ๊ณณ, ์•„๋‹ˆ๋ฉด ๊ทธ์ชฝ ์–ด๋”˜๊ฐ€์— ์žˆ์„ ๊ฒƒ ๊ฐ™์•„์š”.
15:06
I don't actually know if it's that way.
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์‹ค์ œ๋กœ ๊ทธ๋Ÿฐ ๊ฒƒ์ธ์ง€๋Š” ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
15:09
I don't know where it is.
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๋‚˜๋Š” ๊ทธ๊ฒƒ์ด ์–ด๋””์— ์žˆ๋Š”์ง€ ๋ชจ๋ฅธ๋‹ค.
15:11
But it is just a whole
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๊ทธ๋Ÿฌ๋‚˜ ๊ทธ๊ฒƒ์€
15:12
bunch of, basically rocks, space rocks.
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๊ธฐ๋ณธ์ ์œผ๋กœ ์•”์„, ์šฐ์ฃผ ์•”์„์˜ ์ „์ฒด ๋ฌถ์Œ์ž…๋‹ˆ๋‹ค.
15:16
So asteroids, though, can have frozen water or even other
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๋”ฐ๋ผ์„œ ์†Œํ–‰์„ฑ์—๋Š” ๋ฌผ์ด ์–ผ์–ด๋ถ™์„ ์ˆ˜๋„ ์žˆ๊ณ  ์‹ฌ์ง€์–ด
15:21
gases that are frozen or just rock or metal.
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์–ผ์–ด๋ถ™์€ ๋‹ค๋ฅธ ๊ฐ€์Šค๋‚˜ ์•”์„์ด๋‚˜ ๊ธˆ์†๋งŒ ์žˆ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
15:25
All of the things that we have on
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์šฐ๋ฆฌ๊ฐ€ ์ง€๊ตฌ์ƒ์— ๊ฐ€์ง€๊ณ  ์žˆ๋Š” ๋ชจ๋“  ๊ฒƒ๋“ค์€
15:26
Earth can be also found in asteroids, so
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์†Œํ–‰์„ฑ์—์„œ๋„ ๋ฐœ๊ฒฌ๋  ์ˆ˜ ์žˆ์œผ๋ฏ€๋กœ, ์†Œํ–‰์„ฑ
15:30
they can be very rich in different materials.
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์—๋Š” ๋‹ค์–‘ํ•œ ๋ฌผ์งˆ์ด ๋งค์šฐ ํ’๋ถ€ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
15:34
A meteor or a meteorite and a falling star is the same.
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์œ ์„ฑ์ด๋‚˜ ์šด์„๊ณผ ๋–จ์–ด์ง€๋Š” ๋ณ„์€ ๊ฐ™์Šต๋‹ˆ๋‹ค.
15:39
Is that the next slide? Shooting star.
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๊ทธ๊ฒŒ ๋‹ค์Œ ์Šฌ๋ผ์ด๋“œ์ธ๊ฐ€์š”? ์ŠˆํŒ…์Šคํƒ€.
15:41
Falling star.
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๋ณ„๋˜ฅ๋ณ„.
15:42
So a meteor is a piece of debris, something that
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๋”ฐ๋ผ์„œ ์œ ์„ฑ์€
15:47
falls from space to Earth that's not man made.
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์‚ฌ๋žŒ์ด ๋งŒ๋“  ๊ฒƒ์ด ์•„๋‹Œ ์šฐ์ฃผ์—์„œ ์ง€๊ตฌ๋กœ ๋–จ์–ด์ง„ ์ž”ํ•ด ์กฐ๊ฐ์ž…๋‹ˆ๋‹ค.
15:51
So if a big chunk of rock comes into
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๋”ฐ๋ผ์„œ ํฐ ๋ฉ์–ด๋ฆฌ์˜ ์•”์„์ด
15:55
our atmosphere and falls to the Earth, we would
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์šฐ๋ฆฌ ๋Œ€๊ธฐ๊ถŒ์œผ๋กœ ๋“ค์–ด์™€ ์ง€๊ตฌ์— ๋–จ์–ด์ง€๋ฉด ์šฐ๋ฆฌ๋Š”
15:58
call it a meteor or a meteorite. It's the same thing.
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๊ทธ๊ฒƒ์„ ์œ ์„ฑ ๋˜๋Š” ์šด์„์ด๋ผ๊ณ  ๋ถ€๋ฅผ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ทธ๊ฑด ๊ฐ™์€๊ฑฐ์•ผ.
16:01
I think a meteorite might be a little smaller.
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๋‚ด ์ƒ๊ฐ์—” ์šด์„์ด ์ข€ ๋” ์ž‘์„ ์ˆ˜๋„ ์žˆ์„ ๊ฒƒ ๊ฐ™์•„.
16:03
I don't really know.
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๋‚˜๋Š” ์ •๋ง๋กœ ๋ชจ๋ฅธ๋‹ค.
16:04
But when you see a falling star,
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ํ•˜์ง€๋งŒ ๋–จ์–ด์ง€๋Š” ๋ณ„์„ ๋ณด๋ฉด
16:07
it's actually a meteor or a meteorite.
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์‹ค์ œ๋กœ๋Š” ์œ ์„ฑ์ด๊ฑฐ๋‚˜ ์šด์„์ž…๋‹ˆ๋‹ค.
16:09
They are the same thing.
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๊ทธ๋“ค์€ ๊ฐ™์€ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
16:10
So a shooting star or a
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๋”ฐ๋ผ์„œ ์œ ์„ฑ์ด๋‚˜
16:12
falling star isn't actually a star.
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๋–จ์–ด์ง€๋Š” ๋ณ„์€ ์‹ค์ œ๋กœ ๋ณ„์ด ์•„๋‹™๋‹ˆ๋‹ค.
16:15
That would be bad.
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๊ทธ๊ฒƒ์€ ๋‚˜์œ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
16:16
If a gigantic star hit our planet, that would be bad.
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๊ฑฐ๋Œ€ํ•œ ๋ณ„์ด ์šฐ๋ฆฌ ํ–‰์„ฑ์— ์ถฉ๋Œํ•œ๋‹ค๋ฉด ๊ทธ๊ฒƒ์€ ๋‚˜์  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
16:20
But definitely sometimes at night, you can see
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ํ•˜์ง€๋งŒ ํ™•์‹คํžˆ ๊ฐ€๋” ๋ฐค์—๋Š”
16:23
meteors fall, and you can find meteors.
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์œ ์„ฑ์ด ๋–จ์–ด์ง€๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๊ณ , ์œ ์„ฑ์„ ๋ฐœ๊ฒฌํ•  ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
16:27
There was actually a news story of a man who
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์‹ค์ œ๋กœ
16:29
recently found a meteor, I think, on the roof of
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์ตœ๊ทผ์— ์ž์‹ ์˜ ์ง‘ ์ง€๋ถ•์—์„œ ์œ ์„ฑ์„ ๋ฐœ๊ฒฌํ•œ ํ•œ ๋‚จ์ž์— ๋Œ€ํ•œ ๋‰ด์Šค ๊ธฐ์‚ฌ๊ฐ€ ์žˆ์—ˆ๋Š”๋ฐ
16:32
his house, and it was very, very valuable.
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, ๊ทธ๊ฒƒ์€ ๋งค์šฐ ๊ท€์ค‘ํ•œ ๊ฒƒ์ด์—ˆ์Šต๋‹ˆ๋‹ค.
16:36
And, yes, sometimes we actually have meteor showers.
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๊ทธ๋ฆฌ๊ณ  ๋„ค, ๋•Œ๋กœ๋Š” ์‹ค์ œ๋กœ ์œ ์„ฑ์šฐ๊ฐ€ ๋‚ด๋ฆฌ๋Š” ๊ฒฝ์šฐ๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
16:40
And if you go out at night, you will
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๊ทธ๋ฆฌ๊ณ  ๋ฐค์— ๋‚˜๊ฐ€๋ฉด
16:42
see a lot of meteors falling from the sky. A comet.
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ํ•˜๋Š˜์—์„œ ์ˆ˜๋งŽ์€ ์œ ์„ฑ์ด ๋–จ์–ด์ง€๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ํ˜œ์„ฑ.
16:47
So a comet is a little hard for me to describe.
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๊ทธ๋ž˜์„œ ํ˜œ์„ฑ์€ ์ œ๊ฐ€ ์„ค๋ช…ํ•˜๊ธฐ๊ฐ€ ์กฐ๊ธˆ ์–ด๋ ต์Šต๋‹ˆ๋‹ค.
16:50
It's a giant ball of rock and ice that orbits the
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๊ทธ๊ฒƒ์€ ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•˜๋Š” ๊ฑฐ๋Œ€ํ•œ ๋ฐ”์œ„์™€ ์–ผ์Œ ๊ณต
16:55
sun, and as it orbits, it leaves a trail behind it.
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์ด๋ฉฐ, ๊ณต์ „ํ•˜๋ฉด์„œ ๋’ค์— ํ”์ ์„ ๋‚จ๊น๋‹ˆ๋‹ค.
16:59
It kind of reflects the sun's light, and I'm
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๊ทธ๊ฒƒ์€ ์ผ์ข…์˜ ํƒœ์–‘๋น›์„ ๋ฐ˜์‚ฌํ•˜๋Š”๋ฐ,
17:02
not sure if it has its own light.
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๊ทธ๊ฒƒ์ด ์ž์ฒด์ ์ธ ๋น›์„ ๊ฐ–๊ณ  ์žˆ๋Š”์ง€๋Š” ์ž˜ ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
17:04
But the most famous comet is Haley's comet.
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ํ•˜์ง€๋งŒ ๊ฐ€์žฅ ์œ ๋ช…ํ•œ ํ˜œ์„ฑ์€ ํ—ค์ผ๋ฆฌ ํ˜œ์„ฑ์ž…๋‹ˆ๋‹ค.
17:08
So if I put famous comet, Haley's comet is
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๊ทธ๋ž˜์„œ ์œ ๋ช…ํ•œ ํ˜œ์„ฑ์„ ๋„ฃ์œผ๋ฉด ํ—ค์ผ๋ฆฌ ํ˜œ์„ฑ์€
17:13
the most famous visible every 75 to 79 years.
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75~79๋…„๋งˆ๋‹ค ๊ฐ€์žฅ ์œ ๋ช…ํ•œ ํ˜œ์„ฑ์ด ๋ฉ๋‹ˆ๋‹ค.
17:21
And then I'm going to get the official.
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๊ทธ๋ฆฌ๊ณ  ๋‚˜์„œ ๊ณต๋ฌด์›์„ ๋งŒ๋‚˜๋Ÿฌ ๊ฐ€๊ฒ ์Šต๋‹ˆ๋‹ค.
17:25
So, comets are large objects made of
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๋”ฐ๋ผ์„œ ํ˜œ์„ฑ์€
17:27
dust and ice that orbit the sun,
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ํƒœ์–‘ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•˜๋Š” ๋จผ์ง€์™€ ์–ผ์Œ์œผ๋กœ ๋งŒ๋“ค์–ด์ง„ ํฐ ๋ฌผ์ฒด์ด๋ฉฐ
17:29
best known for their long, streaming tails.
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๊ธธ๊ณ  ํ๋ฅด๋Š” ๊ผฌ๋ฆฌ๋กœ ๊ฐ€์žฅ ์ž˜ ์•Œ๋ ค์ ธ ์žˆ์Šต๋‹ˆ๋‹ค.
17:32
So dust and ice. There you go.
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๊ทธ๋ž˜์„œ ๋จผ์ง€์™€ ์–ผ์Œ. ๋์–ด์š”.
17:34
Very cool.
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์•„์ฃผ ๋ฉ‹์ง€๋‹ค.
17:35
I don't remember if I've ever seen a comet.
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๋‚˜๋Š” ํ˜œ์„ฑ์„ ๋ณธ ์ ์ด ์žˆ๋Š”์ง€ ๊ธฐ์–ต์ด ๋‚˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
17:38
I don't think I have an eclipse.
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์ œ ์ƒ๊ฐ์—” ์ผ์‹์ด ์—†๋Š” ๊ฒƒ ๊ฐ™์•„์š”.
17:41
There's two kinds of eclipses.
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์ผ์‹์—๋Š” ๋‘ ๊ฐ€์ง€ ์ข…๋ฅ˜๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
17:42
There's a solar eclipse and a lunar eclipse.
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์ผ์‹๊ณผ ์›”์‹์ด ์žˆ์Šต๋‹ˆ๋‹ค.
17:46
There's actually an eclipse coming up
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์‹ค์ œ๋กœ
17:49
in North America in April.
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4์›”์— ๋ถ๋ฏธ์— ์ผ์‹์ด ๋‹ค๊ฐ€์˜ค๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
17:51
There's going to be a full solar eclipse.
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์™„์ „ํ•œ ์ผ์‹์ด ์žˆ์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
17:56
I think it's happening after the school day, but
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์ œ ์ƒ๊ฐ์—” ํ•™๊ต ์ˆ˜์—…์ด ๋๋‚œ ํ›„์— ์ผ์–ด๋‚˜๋Š” ์ผ์ธ ๊ฒƒ ๊ฐ™์•„์š”. ํ•˜์ง€๋งŒ
18:00
I think we're having a longer school day on
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18:03
the day of the eclipse because the path of
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์ผ์‹์ด ์žˆ๋Š” ๋‚ ์—๋Š” ์ผ์‹์˜ ๊ฒฝ๋กœ๊ฐ€
18:06
the eclipse goes right across the United States and
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๋ฏธ๊ตญ์„ ๊ฐ€๋กœ์งˆ๋Ÿฌ
18:09
then right into our part of Canada.
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์บ๋‚˜๋‹ค๋กœ ๋ฐ”๋กœ ๋“ค์–ด๊ฐ€๊ธฐ ๋•Œ๋ฌธ์— ์ˆ˜์—… ์‹œ๊ฐ„์ด ๋” ๊ธธ์–ด์งˆ ๊ฒƒ ๊ฐ™์•„์š”.
18:11
So we're going to get all of the special glasses,
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ๋Š” ํŠน์ˆ˜ ์•ˆ๊ฒฝ์„ ๋ชจ๋‘ ์–ป์„ ์˜ˆ์ •์ด๊ณ ,
18:15
and we're going to stay late because I think the
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18:17
eclipse happens around 04:00 and I'm not sure the exact
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์ผ์‹์ด 04:00์ฏค์— ์ผ์–ด๋‚˜๋Š” ๊ฒƒ ๊ฐ™๊ณ  ์ •ํ™•ํ•œ
18:21
date, but an eclipse is when the moon goes between
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๋‚ ์งœ๋Š” ์ž˜ ๋ชจ๋ฅด๊ฒ ์ง€๋งŒ ์ผ์‹์€ ๋‹ฌ์ด ๊ทธ ์‚ฌ์ด์— ๋“ค์–ด๊ฐ€๋Š” ๋•Œ์ด๊ธฐ ๋•Œ๋ฌธ์— ๋Šฆ๊ฒŒ๊นŒ์ง€ ๋จธ๋ฌผ ์˜ˆ์ •์ž…๋‹ˆ๋‹ค.
18:26
the earth and the sun or when the earth goes
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์ง€๊ตฌ์™€ ํƒœ์–‘ ๋˜๋Š” ์ง€๊ตฌ๊ฐ€
18:29
between the moon and the sun.
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๋‹ฌ๊ณผ ํƒœ์–‘ ์‚ฌ์ด์— ๋“ค์–ด๊ฐˆ ๋•Œ.
18:31
So a solar eclipse is when the
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๊ทธ๋ž˜์„œ ์ผ์‹์€
18:33
moon crosses in front of the sun.
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๋‹ฌ์ด ํƒœ์–‘ ์•ž์œผ๋กœ ์ง€๋‚˜๊ฐˆ ๋•Œ์ž…๋‹ˆ๋‹ค.
18:36
Here, we'll do an eclipse right here.
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์—ฌ๊ธฐ, ๋ฐ”๋กœ ์—ฌ๊ธฐ์„œ ์ผ์‹์„ ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.
18:38
My face is the sun, and then this is a solar eclipse.
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๋‚ด ์–ผ๊ตด์€ ํƒœ์–‘์ด๊ณ  ์ด๊ฒƒ์€ ์ผ์‹์ž…๋‹ˆ๋‹ค.
18:43
Right. And then don't look.
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์˜ค๋ฅธ์ชฝ. ๊ทธ๋ฆฌ๊ณ  ๋ณด์ง€ ๋งˆ์„ธ์š”.
18:44
You need special glasses.
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ํŠน๋ณ„ํ•œ ์•ˆ๊ฒฝ์ด ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.
18:46
Otherwise you can damage your eyes.
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๊ทธ๋ ‡์ง€ ์•Š์œผ๋ฉด ๋ˆˆ์ด ์†์ƒ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
18:50
The Milky Way.
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์€ํ•˜์ˆ˜.
18:51
So the Milky Way is a galaxy, and the
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๊ทธ๋ž˜์„œ ์€ํ•˜์ˆ˜๋Š” ์€ํ•˜์ด๊ณ ,
18:54
Milky Way is the galaxy that we live in.
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์€ํ•˜์ˆ˜๋Š” ์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์€ํ•˜์ž…๋‹ˆ๋‹ค.
18:57
And it's so big that you can see it like we're
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๊ทธ๋ฆฌ๊ณ  ์€ํ•˜์ˆ˜๋Š” ๋„ˆ๋ฌด ์ปค์„œ ์šฐ๋ฆฌ๊ฐ€ ๊ทธ ์•ˆ์— ์žˆ๋Š” ๊ฒƒ์ฒ˜๋Ÿผ ๋ณผ ์ˆ˜
19:01
in it, but you can still see it sometimes at night.
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์žˆ์ง€๋งŒ ๊ฐ€๋” ๋ฐค์—๋„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์€ํ•˜์ˆ˜๋ฅผ ๋ณด๋ ค๋ฉด
19:04
You do need to be somewhere very dark in order
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์•„์ฃผ ์–ด๋‘์šด ๊ณณ์— ์žˆ์–ด์•ผ
19:07
to see the Milky Way, but you can kind of
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ํ•˜์ง€๋งŒ
19:10
see parts of the galaxy that we live in.
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์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์€ํ•˜๊ณ„์˜ ์ผ๋ถ€๋„ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
19:14
Not sure why they called it the Milky Way.
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์™œ ์€ํ•˜์ˆ˜๋ผ๊ณ  ๋ถ€๋ฅด๋Š”์ง€ ์ž˜ ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
19:17
Probably because it looks kind of white.
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์•„๋งˆ๋„ ํฐ์ƒ‰์ฒ˜๋Ÿผ ๋ณด์ด๊ธฐ ๋•Œ๋ฌธ์ผ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
19:19
But then, as I said, the Milky Way is a galaxy, and
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ํ•˜์ง€๋งŒ ์ œ๊ฐ€ ๋งํ–ˆ๋“ฏ์ด ์€ํ•˜์ˆ˜๋Š” ์€ํ•˜์ด๊ณ 
19:24
the galaxy that we live in, the Milky Way is a galaxy,
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์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์€ํ•˜๊ณ„๋Š” ์€ํ•˜์ˆ˜
19:28
and the galaxy that we live in is the Milky Way.
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์ด๊ณ  ์šฐ๋ฆฌ๊ฐ€ ์‚ด๊ณ  ์žˆ๋Š” ์€ํ•˜๊ณ„๋Š” ์€ํ•˜์ˆ˜์ž…๋‹ˆ๋‹ค.
19:30
There you go.
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19:30
There's a sentence that makes sense,
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๋์–ด์š”.
๋ง์ด ๋˜๋Š” ๋ฌธ์žฅ์ด ์žˆ๋Š”๋ฐ ์ข€
19:33
but sounds kind of silly.
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์ด์ƒํ•˜๊ฒŒ ๋“ค๋ฆฌ๋„ค์š”.
19:34
A galaxy is a collection of all different
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์€ํ•˜๊ณ„๋Š”
19:38
things in space held together by gravity.
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์ค‘๋ ฅ์— ์˜ํ•ด ํ•จ๊ป˜ ๋ฌถ์ธ ์šฐ์ฃผ์˜ ๋ชจ๋“  ๋‹ค๋ฅธ ๊ฒƒ๋“ค์˜ ์ง‘ํ•ฉ์ฒด์ž…๋‹ˆ๋‹ค.
19:41
So there is a spin to a galaxy, and there
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๋”ฐ๋ผ์„œ ์€ํ•˜๊ณ„์—๋Š” ํšŒ์ „์ด ์žˆ๊ณ 
19:44
is some gravity, and it has stars and planets.
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์•ฝ๊ฐ„์˜ ์ค‘๋ ฅ์ด ์žˆ์œผ๋ฉฐ ๋ณ„๊ณผ ํ–‰์„ฑ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
19:47
And everything that you can imagine
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๊ทธ๋ฆฌ๊ณ  ๋‹น์‹ ์ด ์ƒ์ƒํ•  ์ˆ˜ ์žˆ๋Š” ๋ชจ๋“  ๊ฒƒ์€
19:49
existing is in a galaxy.
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์€ํ•˜๊ณ„์— ์žˆ์Šต๋‹ˆ๋‹ค.
19:53
Really fun, though.
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๊ทธ๋ž˜๋„ ์ •๋ง ์žฌ๋ฏธ์žˆ์–ด์š”.
19:54
Sometimes at night, you can see it a little bit here, but
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๊ฐ€๋” ๋ฐค์— ์—ฌ๊ธฐ๊ฐ€ ์กฐ๊ธˆ ๋ณด์ด๊ธด ํ•˜๋Š”๋ฐ
19:57
it has to be really dark and a really clear night.
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์ •๋ง ์–ด๋‘ก๊ณ  ์ •๋ง ๋ง‘์€ ๋ฐค์ด์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
20:03
And then, of course, that is what
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๊ทธ๋ฆฌ๊ณ  ๋ฌผ๋ก , ๊ทธ๊ฒƒ์ด
20:05
the universe is made up of.
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์šฐ์ฃผ๋ฅผ ๊ตฌ์„ฑํ•˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
20:07
So every shiny part of this picture is a galaxy.
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๋”ฐ๋ผ์„œ ์ด ์‚ฌ์ง„์˜ ๋ชจ๋“  ๋น›๋‚˜๋Š” ๋ถ€๋ถ„์€ ์€ํ•˜๊ณ„์ž…๋‹ˆ๋‹ค.
20:12
So our galaxy is enormous, but
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ ์€ํ•˜๊ณ„๋Š” ๊ฑฐ๋Œ€ํ•˜์ง€๋งŒ
20:16
the universe is even bigger.
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์šฐ์ฃผ๋Š” ํ›จ์”ฌ ๋” ํฝ๋‹ˆ๋‹ค.
20:18
The universe is basically everything
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์šฐ์ฃผ๋Š” ๊ธฐ๋ณธ์ ์œผ๋กœ
20:21
that exists is the universe.
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์กด์žฌํ•˜๋Š” ๋ชจ๋“  ๊ฒƒ์ด ์šฐ์ฃผ์ž…๋‹ˆ๋‹ค.
20:23
So we live in a very, very big universe.
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๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ๋Š” ์•„์ฃผ ์•„์ฃผ ํฐ ์šฐ์ฃผ์— ์‚ด๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
20:25
If you can think that just looking in one direction,
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ํ•œ ๋ฐฉํ–ฅ์œผ๋กœ๋งŒ ๋ณด๋ฉด
20:29
there are that many galaxies, it's a little bit crazy
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์€ํ•˜๊ณ„๊ฐ€ ์ด๋ ‡๊ฒŒ ๋งŽ๋‹ค๊ณ  ์ƒ๊ฐํ•  ์ˆ˜ ์žˆ๋‹ค๋ฉด,
20:32
to think, well, how many galaxies are there?
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์€ํ•˜๊ณ„๊ฐ€ ๋ช‡ ๊ฐœ๋‚˜ ์žˆ๋‹ค๊ณ  ์ƒ๊ฐํ•˜๋Š” ๊ฑด ์ข€ ๋ฏธ์นœ ์ง“์ž…๋‹ˆ๋‹ค.
20:35
How many galaxies in the 2 trillion galaxies?
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2์กฐ ๊ฐœ์˜ ์€ํ•˜๊ณ„ ์ค‘ ์€ํ•˜๊ณ„๋Š” ๋ช‡ ๊ฐœ์ผ๊นŒ์š”?
20:40
Okay, that's just a little crazy.
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์ข‹์•„์š”, ๊ทธ๊ฑด ์ข€ ๋ฏธ์นœ ๊ฒƒ ๊ฐ™์•„์š”.
20:43
It's estimated that there are between 200 billion
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20:47
to 2 trillion galaxy in the observable universe.
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๊ด€์ธก ๊ฐ€๋Šฅํ•œ ์šฐ์ฃผ์—๋Š” 2000์–ต~2์กฐ ๊ฐœ์˜ ์€ํ•˜๊ฐ€ ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ์ถ”์ •๋œ๋‹ค.
20:52
Yeah, that's a lot.
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๋„ค, ๊ทธ๊ฑฐ ๋งŽ์•„์š”.
20:55
Satellite.
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์œ„์„ฑ.
20:56
So humans decided that if things can orbit planets, why
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๊ทธ๋ž˜์„œ ์ธ๊ฐ„์€ ์‚ฌ๋ฌผ์ด ํ–‰์„ฑ ์ฃผ์œ„๋ฅผ ๊ณต์ „ํ•  ์ˆ˜ ์žˆ๋‹ค๋ฉด ์™œ
21:04
don't we make things and stick them in orbit?
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๋ฌผ๊ฑด์„ ๋งŒ๋“ค์–ด์„œ ๊ถค๋„์— ๊ณ ์ •์‹œํ‚ค๋Š” ๊ฒƒ์ด ์–ด๋–จ๊นŒ ๊ฒฐ์ •ํ–ˆ์Šต๋‹ˆ๋‹ค.
21:07
And one of the things we make is called a satellite.
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๊ทธ๋ฆฌ๊ณ  ์šฐ๋ฆฌ๊ฐ€ ๋งŒ๋“œ๋Š” ๊ฒƒ ์ค‘ ํ•˜๋‚˜๊ฐ€ ์œ„์„ฑ์ด๋ผ๊ณ  ํ•ฉ๋‹ˆ๋‹ค.
21:10
Satellites are generally used for communication.
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์œ„์„ฑ์€ ์ผ๋ฐ˜์ ์œผ๋กœ ํ†ต์‹ ์— ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.
21:14
So a satellite is a man made object that we
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๋”ฐ๋ผ์„œ ์œ„์„ฑ์€ ์ธ๊ฐ„์ด ๋งŒ๋“  ๋ฌผ์ฒด๋กœ ์šฐ๋ฆฌ๊ฐ€
21:17
launch into space on a rocket, and then it circles
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๋กœ์ผ“์„ ํƒ€๊ณ  ์šฐ์ฃผ๋กœ ๋ฐœ์‚ฌํ•œ ๋‹ค์Œ
21:21
the earth, or it stays in exactly the same spot.
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์ง€๊ตฌ๋ฅผ ๋Œ๊ฑฐ๋‚˜ ์ •ํ™•ํžˆ ๊ฐ™์€ ์ง€์ ์— ๋จธ๋ฌด๋ฅด๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ง€๊ตฌ๋™๊ธฐ
21:26
There's something called geosynchronous orbit,
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๊ถค๋„(Geosynchronous Orbit)๋ผ๋Š” ๊ฒƒ์ด ์žˆ๋Š”๋ฐ,
21:29
which is pretty wild.
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๊ฝค ์ด์ƒํ•ฉ๋‹ˆ๋‹ค.
21:30
What that means is that as the earth
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์ด๊ฒƒ์ด ์˜๋ฏธํ•˜๋Š” ๋ฐ”๋Š” ์ง€๊ตฌ๊ฐ€
21:32
turns, the satellite stays in the same spot.
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ํšŒ์ „ํ•จ์— ๋”ฐ๋ผ ์œ„์„ฑ์€ ๊ฐ™์€ ์ž๋ฆฌ์— ๋จธ๋ฌด๋ฅธ๋‹ค๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
21:37
That's pretty cool, because then you know
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๊ทธ๊ฒƒ์€ ๋งค์šฐ ๋ฉ‹์ง„ ์ผ์ž…๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋ฉด
21:39
that at a certain spot in the
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ํ•˜๋Š˜์˜ ํŠน์ • ์ง€์ ์—
21:41
sky, the satellite will always be there.
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์œ„์„ฑ์ด ํ•ญ์ƒ ๊ทธ ์ž๋ฆฌ์— ์žˆ์„ ๊ฒƒ์ด๋ผ๋Š” ๊ฒƒ์„ ์•Œ ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
21:45
Generally.
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์ผ๋ฐ˜์ ์œผ๋กœ.
21:46
Initially, satellites were used for communication.
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์ฒ˜์Œ์—๋Š” ์œ„์„ฑ์ด ํ†ต์‹ ์— ์‚ฌ์šฉ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.
21:49
They are now also used for things like GPS.
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์ด์ œ GPS์™€ ๊ฐ™์€ ์šฉ๋„๋กœ๋„ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.
21:52
Like the gps in your phone connects to three
436
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๋งˆ์น˜ ํœด๋Œ€์ „ํ™”์˜ GPS๊ฐ€ ์„ธ ๊ฐœ์˜ ์œ„์„ฑ์— ์—ฐ๊ฒฐ๋˜๋ฉด ์ž์‹ ์ด
21:55
satellites and then you know where you are.
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์–ด๋””์— ์žˆ๋Š”์ง€ ์•Œ ์ˆ˜ ์žˆ๋Š” ๊ฒƒ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค. ๊ตฌ๊ธ€ ์ง€๋„๋ฅผ ์‚ฌ์šฉํ•  ๋•Œ
21:57
They're also used to take photographs
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์‚ฌ์ง„์„ ์ฐ๋Š” ๋ฐ์—๋„ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค
21:59
when you use Google maps.
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.
22:00
Now, the images are from satellites, but satellites
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์ž, ์ด๋ฏธ์ง€๋Š” ์œ„์„ฑ์—์„œ ๋‚˜์˜จ ๊ฒƒ์ด์ง€๋งŒ ์œ„์„ฑ์€
22:05
basically are man made things put into space.
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๊ธฐ๋ณธ์ ์œผ๋กœ ์‚ฌ๋žŒ์ด ๋งŒ๋“  ๋ฌผ๊ฑด์„ ์šฐ์ฃผ์— ์˜ฌ๋ ค๋†“์€ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
22:09
I think it can be non man made as well.
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์‚ฌ๋žŒ์ด ๋งŒ๋“  ๊ฒƒ์ด ์•„๋‹ ์ˆ˜๋„ ์žˆ๋‹ค๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.
22:11
I think a piece of rock could be a satellite.
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๋‚ด ์ƒ๊ฐ์—” ๋ฐ”์œ„ ์กฐ๊ฐ์ด ์œ„์„ฑ์ด ๋  ์ˆ˜๋„ ์žˆ์„ ๊ฒƒ ๊ฐ™์•„์š”.
22:14
But generally when you say satellite, we're talking about
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ํ•˜์ง€๋งŒ ์ผ๋ฐ˜์ ์œผ๋กœ ์œ„์„ฑ์ด๋ผ๊ณ  ํ•˜๋ฉด
22:18
something like that that we put into space.
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์šฐ๋ฆฌ๊ฐ€ ์šฐ์ฃผ์— ๋ณด๋‚ด๋Š” ๊ฒƒ๊ณผ ๋น„์Šทํ•œ ๊ฒƒ์„ ๋งํ•˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
22:21
We also put things in space, like space stations.
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์šฐ๋ฆฌ๋Š” ๋˜ํ•œ ์šฐ์ฃผ ์ •๊ฑฐ์žฅ๊ณผ ๊ฐ™์€ ์šฐ์ฃผ์— ๋ฌผ๊ฑด์„ ๋†“๊ธฐ๋„ ํ•ฉ๋‹ˆ๋‹ค.
22:24
There's an international space station where
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1344471
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22:27
different astronauts from different countries can
448
1347233
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์—ฌ๋Ÿฌ ๋‚˜๋ผ์˜ ๋‹ค์–‘ํ•œ ์šฐ์ฃผ ๋น„ํ–‰์‚ฌ๋“ค์ด
22:30
go and do scientific experiments.
449
1350357
2245
๊ฐ€์„œ ๊ณผํ•™ ์‹คํ—˜์„ ํ•  ์ˆ˜ ์žˆ๋Š” ๊ตญ์ œ ์šฐ์ฃผ ์ •๊ฑฐ์žฅ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
22:32
They can observe the earth, they can
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2009
๊ทธ๋“ค์€ ์ง€๊ตฌ๋ฅผ ๊ด€์ฐฐํ•  ์ˆ˜ ์žˆ๊ณ ,
22:34
see how plants grow in zero gravity.
451
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๋ฌด์ค‘๋ ฅ ์ƒํƒœ์—์„œ ์‹๋ฌผ์ด ์–ด๋–ป๊ฒŒ ์ž๋ผ๋Š”์ง€ ๋ณผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
22:37
But it is. I don't know.
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ํ•˜์ง€๋งŒ ๊ทธ๊ฒƒ์€. ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
22:39
I always feel claustrophobic when I see
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4403
๋‚˜๋Š”
22:44
images of people in the space station.
454
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์šฐ์ฃผ์ •๊ฑฐ์žฅ์— ์žˆ๋Š” ์‚ฌ๋žŒ๋“ค์˜ ์‚ฌ์ง„์„ ๋ณผ ๋•Œ๋งˆ๋‹ค ํ•ญ์ƒ ํ์‡„๊ณตํฌ์ฆ์„ ๋Š๋‚€๋‹ค.
22:46
When you're claustrophobic, you don't like being in
455
1366703
3321
๋ฐ€์‹ค๊ณตํฌ์ฆ์ด ์žˆ๋Š” ์‚ฌ๋žŒ์€ ๊ณต๊ฐ„์ด ๋ณ„๋กœ ์—†๋Š” ๊ณต๊ฐ„์— ์žˆ๋Š” ๊ฒƒ์„ ์ข‹์•„ํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค
22:50
a space where there's not very much room.
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.
22:55
Let's see here.
457
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1330
์—ฌ๊ธฐ์„œ ๋ด…์‹œ๋‹ค.
22:57
A crater.
458
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1109
๋ถ„ํ™”๊ตฌ.
22:58
When an object from space hits the moon
459
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์šฐ์ฃผ์—์„œ ์˜จ ๋ฌผ์ฒด๊ฐ€ ๋‹ฌ
23:01
or hits Earth, it often leaves a crater.
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์ด๋‚˜ ์ง€๊ตฌ์— ์ถฉ๋Œํ•˜๋ฉด ์ข…์ข… ๋ถ„ํ™”๊ตฌ๊ฐ€ ๋‚จ์Šต๋‹ˆ๋‹ค.
23:04
And on Earth, there are
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1513
๊ทธ๋ฆฌ๊ณ  ์ง€๊ตฌ์ƒ์—๋Š”
23:06
large craters in different countries.
462
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2269
์—ฌ๋Ÿฌ ๋‚˜๋ผ์— ํฐ ๋ถ„ํ™”๊ตฌ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
23:09
And what it's caused is when a gigantic meteor hits
463
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4408
๊ทธ๋ฆฌ๊ณ  ๊ทธ ์›์ธ์€ ๊ฑฐ๋Œ€ํ•œ ์œ ์„ฑ์ด
23:13
the Earth with so much force that it makes all
464
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2969
๋„ˆ๋ฌด ๊ฐ•ํ•œ ํž˜์œผ๋กœ ์ง€๊ตฌ์— ๋ถ€๋”ชํ˜€์„œ ๊ทธ
23:16
of the dirt and rock kind of move out of
465
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4079
23:20
its way because of the force of the impact.
466
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์ถฉ๊ฒฉ์˜ ํž˜์œผ๋กœ ์ธํ•ด ๋ชจ๋“  ํ™๊ณผ ๋ฐ”์œ„๊ฐ€ ๊ทธ ๊ธธ์—์„œ ๋ฒ—์–ด๋‚˜๊ฒŒ ๋งŒ๋“œ๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
23:23
So I think there's a large crater in Canada somewhere.
467
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4079
๊ทธ๋ž˜์„œ ์บ๋‚˜๋‹ค ์–ด๋”˜๊ฐ€์— ํฐ ๋ถ„ํ™”๊ตฌ๊ฐ€ ์žˆ๋Š” ๊ฒƒ ๊ฐ™์•„์š”.
23:27
There's definitely craters in almost every
468
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ํ™•์‹คํžˆ ๊ฑฐ์˜ ๋ชจ๋“  ๋‚˜๋ผ์— ํฌ๋ ˆ์ดํ„ฐ๊ฐ€ ์žˆ๋Š”๋ฐ
23:29
country, but I'm wondering if northern
469
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2565
, ๋ถ๋ถ€
23:32
countries get hit a bit more.
470
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1693
๊ตญ๊ฐ€๋“ค์€ ์ข€ ๋” ํƒ€๊ฒฉ์„ ๋ฐ›๋Š”์ง€ ๊ถ๊ธˆํ•ฉ๋‹ˆ๋‹ค.
23:34
I'm not sure.
471
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์ž˜ ๋ชจ๋ฅด๊ฒ ์Šต๋‹ˆ๋‹ค.
23:35
Again, not a science lesson.
472
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1928
๋‹ค์‹œ ๋งํ•˜์ง€๋งŒ, ๊ณผํ•™ ์ˆ˜์—…์ด ์•„๋‹™๋‹ˆ๋‹ค.
23:37
The atmosphere.
473
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1119
๋ถ„์œ„๊ธฐ.
23:38
The earth is surrounded by the atmosphere.
474
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์ง€๊ตฌ๋Š” ๋Œ€๊ธฐ๋กœ ๋‘˜๋Ÿฌ์‹ธ์—ฌ ์žˆ์Šต๋‹ˆ๋‹ค.
23:42
This is the air we breathe.
475
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2111
์ด๊ฒƒ์ด ์šฐ๋ฆฌ๊ฐ€ ์ˆจ์‰ฌ๋Š” ๊ณต๊ธฐ์ž…๋‹ˆ๋‹ค.
23:44
When I go outside, I breathe in, and I breathe
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๋ฐ–์— ๋‚˜๊ฐˆ ๋•Œ ์ˆจ์„ ๋“ค์ด๋งˆ์‹œ๋ฉฐ
23:47
out mostly nitrogen and oxygen and a few other gases.
477
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3759
๋Œ€๋ถ€๋ถ„ ์งˆ์†Œ์™€ ์‚ฐ์†Œ, ๊ธฐํƒ€ ๋ช‡ ๊ฐ€์ง€ ๊ฐ€์Šค๋ฅผ ๋‚ด๋ฟœ์Šต๋‹ˆ๋‹ค.
23:51
The oxygen is the important one.
478
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์‚ฐ์†Œ๊ฐ€ ์ค‘์š”ํ•ฉ๋‹ˆ๋‹ค.
23:53
I think the air outside is 20% oxygen
479
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4085
๋‚ด ์ƒ๊ฐ์— ๋ฐ”๊นฅ ๊ณต๊ธฐ๋Š” ์‚ฐ์†Œ 20% ์ •๋„
23:57
or something like that, somewhere in that range.
480
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1795
, ๊ทธ ๋ฒ”์œ„ ์–ด๋”˜๊ฐ€์— ์žˆ๋Š” ๊ฒƒ ๊ฐ™์•„์š”.
23:59
And this is what we need to survive and to live.
481
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4313
๊ทธ๋ฆฌ๊ณ  ์ด๊ฒƒ์ด ์šฐ๋ฆฌ๊ฐ€ ์ƒ์กดํ•˜๊ณ  ์‚ด๊ธฐ ์œ„ํ•ด ํ•„์š”ํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
24:03
The higher you go up, though,
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ํ•˜์ง€๋งŒ ์œ„๋กœ ์˜ฌ๋ผ๊ฐˆ์ˆ˜๋ก
24:06
the thinner the atmosphere is.
483
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2591
๋Œ€๊ธฐ๋Š” ๋” ์–‡์•„์ง‘๋‹ˆ๋‹ค.
24:08
So if you climb a mountain, it's harder to breathe
484
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3289
๊ทธ๋ž˜์„œ ์‚ฐ์— ์˜ค๋ฅด๋ฉด ์•„๋ž˜์—์„œ๋ณด๋‹ค ์œ„์—์„œ ์ˆจ์‰ฌ๊ธฐ๊ฐ€ ๋” ์–ด๋ ต์Šต๋‹ˆ๋‹ค
24:11
at the top than it is at the bottom.
485
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.
24:17
I guess there is less air, but the
486
1457250
2402
๊ณต๊ธฐ๊ฐ€ ์ ์€ ๊ฒƒ ๊ฐ™์ง€๋งŒ
24:19
air is more condensed at the surface.
487
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3941
๊ณต๊ธฐ๊ฐ€ ํ‘œ๋ฉด์— ๋” ์‘์ถ•๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
24:23
And as you go up the mountain, the
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๊ทธ๋ฆฌ๊ณ  ์‚ฐ์— ์˜ฌ๋ผ๊ฐˆ์ˆ˜๋ก
24:25
air is less, there's just less air.
489
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3183
๊ณต๊ธฐ๊ฐ€ ์ ์–ด์ง€๊ณ  ๊ณต๊ธฐ๋„ ์ ์–ด์ง‘๋‹ˆ๋‹ค.
24:28
The air is thinner we'll say it that way.
490
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2511
๊ณต๊ธฐ๋Š” ๋” ์–‡์Šต๋‹ˆ๋‹ค. ๊ทธ๋ ‡๊ฒŒ ๋งํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.
24:30
But the atmosphere is the layer of air around the
491
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4403
๊ทธ๋Ÿฌ๋‚˜ ๋Œ€๊ธฐ๋Š”
24:35
earth that has clouds and air and all of the
492
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3199
๊ตฌ๋ฆ„๊ณผ ๊ณต๊ธฐ, ๊ทธ๋ฆฌ๊ณ 
24:38
things in it that we need a light year.
493
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4239
๊ทธ ์•ˆ์— ์šฐ๋ฆฌ๊ฐ€ ๊ด‘๋…„์„ ํ•„์š”๋กœ ํ•˜๋Š” ๋ชจ๋“  ๊ฒƒ์„ ํฌํ•จํ•˜๋Š” ์ง€๊ตฌ ์ฃผ๋ณ€์˜ ๊ณต๊ธฐ์ธต์ž…๋‹ˆ๋‹ค.
24:42
So a light year is the distance
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3349
์ฆ‰, 1๊ด‘๋…„์€
24:46
that light travels in one year.
495
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3371
๋น›์ด 1๋…„ ๋™์•ˆ ์ด๋™ํ•˜๋Š” ๊ฑฐ๋ฆฌ์ž…๋‹ˆ๋‹ค.
24:49
So the sun, as we said, is eight
496
1489551
2161
๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ๊ฐ€ ๋งํ–ˆ๋“ฏ์ด ํƒœ์–‘์€
24:51
minutes and 20 seconds from the Earth.
497
1491713
2405
์ง€๊ตฌ์—์„œ 8๋ถ„ 20์ดˆ ๋–จ์–ด์ ธ ์žˆ์Šต๋‹ˆ๋‹ค.
24:54
So it's nowhere near a light year away.
498
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4425
๊ทธ๋Ÿฌ๋‹ˆ 1๊ด‘๋…„๋„ ์ฑ„ ์•ˆ ๋˜๋Š” ๊ฑฐ๋ฆฌ์ž…๋‹ˆ๋‹ค.
24:58
But if you go far enough out into space where
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ํ•˜์ง€๋งŒ ๋‹น์‹ ์ด ์ง€๊ธˆ ์žˆ๋Š” ์šฐ์ฃผ
25:03
you're at, the part where it would take light one
500
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3055
, ์ฆ‰
25:06
year to get there from the sun, you would be
501
1506613
2079
ํƒœ์–‘์œผ๋กœ๋ถ€ํ„ฐ ๊ฑฐ๊ธฐ๊นŒ์ง€ ๋„๋‹ฌํ•˜๋Š” ๋ฐ ๋น›์ด 1๋…„์ด ๊ฑธ๋ฆฌ๋Š” ๋ถ€๋ถ„์œผ๋กœ ์ถฉ๋ถ„ํžˆ ๋ฉ€๋ฆฌ ๊ฐ„๋‹ค๋ฉด, ๋‹น์‹ ์€
25:08
one light year away from the sun.
502
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2799
ํƒœ์–‘์œผ๋กœ๋ถ€ํ„ฐ 1๊ด‘๋…„ ๋–จ์–ด์ ธ ์žˆ๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
25:11
It's one of the things that lets
503
1511493
2725
์ด๋Š”
25:14
us know just how big space is.
504
1514219
2413
๊ณต๊ฐ„์ด ์–ผ๋งˆ๋‚˜ ํฐ์ง€ ์•Œ๋ ค์ฃผ๋Š” ๊ฒƒ ์ค‘ ํ•˜๋‚˜์ž…๋‹ˆ๋‹ค.
25:16
The fact that we have to measure
505
1516633
1445
25:18
it using something called light years.
506
1518079
2265
๊ด‘๋…„์ด๋ผ๋Š” ๊ฒƒ์„ ์‚ฌ์šฉํ•˜์—ฌ ์ธก์ •ํ•ด์•ผ ํ•œ๋‹ค๋Š” ์‚ฌ์‹ค์ž…๋‹ˆ๋‹ค.
25:20
The distance that light can travel in one
507
1520345
2751
๋น›์ด 1๋…„ ๋™์•ˆ ์ด๋™ํ•  ์ˆ˜ ์žˆ๋Š” ๊ฑฐ๋ฆฌ๋ฅผ
25:23
year is used as a measurement nebula.
508
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6121
์ธก์ • ์„ฑ์šด์œผ๋กœ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค.
25:29
I don't really know what a nebula is, but I
509
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2329
๋‚˜๋Š” ์„ฑ์šด์ด ๋ฌด์—‡์ธ์ง€ ์ž˜ ๋ชจ๋ฅด์ง€๋งŒ ๋ง์›๊ฒฝ์œผ๋กœ
25:31
do know that it is a visible thing in the
510
1531549
2879
ํ•˜๋Š˜์—์„œ ๋ณผ ์ˆ˜ ์žˆ๋Š” ๊ฒƒ
25:34
sky with a telescope, where it's just a whole lot
511
1534429
4083
, ์ฆ‰ ์ˆ˜๋งŽ์€
25:38
of cosmic dust and other things in space.
512
1538513
4159
์šฐ์ฃผ ๋จผ์ง€์™€ ์šฐ์ฃผ์˜ ๋‹ค๋ฅธ ๊ฒƒ๋“ค์ด๋ผ๋Š” ๊ฒƒ์€ ์•Œ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
25:42
So I think one of the most
513
1542673
1439
๊ทธ๋ž˜์„œ ์ €๋Š” ๊ฐ€์žฅ
25:44
popular nebulas is the horsehead nebula.
514
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3257
์ธ๊ธฐ ์žˆ๋Š” ์„ฑ์šด ์ค‘ ํ•˜๋‚˜๊ฐ€ ๋ง๋จธ๋ฆฌ ์„ฑ์šด์ด๋ผ๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค. ์–ด์ ฏ๋ฐค์— ๋ดค์ง€๋งŒ
25:47
We're going to look up meaning of nebula, even
515
1547950
3458
์šฐ๋ฆฌ๋Š” ์„ฑ์šด์˜ ์˜๋ฏธ๋ฅผ ์ฐพ์•„๋ณผ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
25:51
though I did last night, a cloud of gas
516
1551409
1993
25:53
and dust in space visible in the night sky,
517
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3423
๋ฐคํ•˜๋Š˜์— ๋ณด์ด๋Š” ์šฐ์ฃผ์˜ ๊ฐ€์Šค์™€ ๋จผ์ง€ ๊ตฌ๋ฆ„์€
25:56
usually with a telescope as a bright patch or
518
1556827
3129
์ผ๋ฐ˜์ ์œผ๋กœ ๋ง์›๊ฒฝ์œผ๋กœ ๋ฐ์€ ๋ถ€๋ถ„์ด๋‚˜
25:59
as a dark silhouette against other luminous matter.
519
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4271
๋‹ค๋ฅธ ๋น›๋‚˜๋Š” ๋ฌผ์งˆ์— ๋Œ€ํ•œ ์–ด๋‘์šด ์‹ค๋ฃจ์—ฃ์œผ๋กœ ๋‚˜ํƒ€๋‚ฉ๋‹ˆ๋‹ค.
26:04
Luminous meaning things that emit light.
520
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2611
๋ฐœ๊ด‘์ด๋ž€ ๋น›์„ ๋ฐœ์‚ฐํ•˜๋Š” ๊ฒƒ์„ ์˜๋ฏธํ•ฉ๋‹ˆ๋‹ค.
26:06
So here's the simple thing.
521
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2415
๊ทธ๋ž˜์„œ ์—ฌ๊ธฐ์— ๊ฐ„๋‹จํ•œ ๊ฒƒ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
26:09
It's a cool thing in the sky to look at.
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ํ•˜๋Š˜์—์„œ ๋ฐ”๋ผ๋ณด๋Š” ๊ฒƒ์€ ๋ฉ‹์ง„ ์ผ์ž…๋‹ˆ๋‹ค.
26:11
That's what I would say a nebula is.
523
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๊ทธ๊ฒƒ์ด ์ œ๊ฐ€ ์„ฑ์šด์ด๋ผ๊ณ  ๋งํ•˜๊ณ  ์‹ถ์€ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
26:14
Now we're going to go into the world
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์ด์ œ ์šฐ๋ฆฌ๋Š” ์ž ์‹œ SF์˜ ์„ธ๊ณ„๋กœ ๋“ค์–ด๊ฐ€ ๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค
26:15
of science fiction for a little bit.
525
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.
26:18
UFO stands for unidentified flying objects. Object.
526
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UFO๋Š” ๋ฏธํ™•์ธ ๋น„ํ–‰ ๋ฌผ์ฒด๋ฅผ ์˜๋ฏธํ•ฉ๋‹ˆ๋‹ค. ๋ฌผ์ฒด.
26:23
I don't personally believe in aliens or ufos.
527
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4021
์ €๋Š” ๊ฐœ์ธ์ ์œผ๋กœ ์™ธ๊ณ„์ธ์ด๋‚˜ UFO๋ฅผ ๋ฏฟ์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
26:27
I've never seen a UFO or an alien.
528
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๋‚˜๋Š” UFO๋‚˜ ์™ธ๊ณ„์ธ์„ ๋ณธ ์ ์ด ์—†์Šต๋‹ˆ๋‹ค.
26:30
Some people think there are spaceships that
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3225
์–ด๋–ค ์‚ฌ๋žŒ๋“ค์€
26:33
come from other planets, and they fly
530
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2405
๋‹ค๋ฅธ ํ–‰์„ฑ์—์„œ ์˜จ ์šฐ์ฃผ์„ ์ด ์žˆ๋‹ค๊ณ  ์ƒ๊ฐํ•˜๊ณ ,
26:35
around at night in our night sky.
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๋ฐคํ•˜๋Š˜์— ๋ฐคํ•˜๋Š˜์„ ๋‚ ์•„๋‹ค๋‹™๋‹ˆ๋‹ค.
26:39
And that on those spaceships, you
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๊ทธ๋ฆฌ๊ณ  ๊ทธ ์šฐ์ฃผ์„ ์—์„œ
26:41
would find an alien or aliens.
533
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2489
์™ธ๊ณ„์ธ์„ ๋ฐœ๊ฒฌํ•˜๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
26:43
So I personally don't think that they exist.
534
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๊ทธ๋ž˜์„œ ์ €๋Š” ๊ฐœ์ธ์ ์œผ๋กœ ๊ทธ๋Ÿฐ ๊ฒƒ๋“ค์ด ์กด์žฌํ•œ๋‹ค๊ณ  ์ƒ๊ฐํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
26:46
I think we would have seen them by now.
535
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์ง€๊ธˆ์ฏค์ด๋ฉด ์šฐ๋ฆฌ๊ฐ€ ๊ทธ๋“ค์„ ๋ดค์„ ๊ฒƒ ๊ฐ™์•„์š”.
26:48
But who knows?
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ํ•˜์ง€๋งŒ ๋ˆ„๊ฐ€ ์•Œ๊ฒ ์–ด์š”?
26:49
I've been wrong before.
537
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๋‚˜๋Š” ์ „์— ํ‹€๋ ธ์–ด์š”.
26:50
But UFO stands for unidentified flying object.
538
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ํ•˜์ง€๋งŒ UFO๋Š” ๋ฏธํ™•์ธ ๋น„ํ–‰๋ฌผ์ฒด(Unidentified Flying Object)๋ฅผ ๋œปํ•ฉ๋‹ˆ๋‹ค.
26:56
And then an alien would be any creature
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๊ทธ๋ฆฌ๊ณ  ์™ธ๊ณ„์ธ์€
27:01
that's not from Earth and not human. Okay?
540
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์ง€๊ตฌ๋‚˜ ์ธ๊ฐ„์ด ์•„๋‹Œ ๋ชจ๋“  ์ƒ๋ฌผ์ด ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ข‹์•„์š”?
27:04
So that is what I would say
541
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๊ทธ๋ž˜์„œ ์ด๊ฒƒ์ด ์ œ๊ฐ€
27:07
is science fiction at this point.
542
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์ด ์‹œ์ ์—์„œ ๊ณต์ƒ๊ณผํ•™ ์†Œ์„ค์ด๋ผ๊ณ  ๋งํ•˜๊ณ  ์‹ถ์€ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
27:08
Not fact, but science fiction.
543
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์‚ฌ์‹ค์ด ์•„๋‹ˆ๋ผ ๊ณต์ƒ ๊ณผํ•™ ์†Œ์„ค์ž…๋‹ˆ๋‹ค.
์ด ์›น์‚ฌ์ดํŠธ ์ •๋ณด

์ด ์‚ฌ์ดํŠธ๋Š” ์˜์–ด ํ•™์Šต์— ์œ ์šฉํ•œ YouTube ๋™์˜์ƒ์„ ์†Œ๊ฐœํ•ฉ๋‹ˆ๋‹ค. ์ „ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์„ ์ƒ๋‹˜๋“ค์ด ๊ฐ€๋ฅด์น˜๋Š” ์˜์–ด ์ˆ˜์—…์„ ๋ณด๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ ๋™์˜์ƒ ํŽ˜์ด์ง€์— ํ‘œ์‹œ๋˜๋Š” ์˜์–ด ์ž๋ง‰์„ ๋”๋ธ” ํด๋ฆญํ•˜๋ฉด ๊ทธ๊ณณ์—์„œ ๋™์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋น„๋””์˜ค ์žฌ์ƒ์— ๋งž์ถฐ ์ž๋ง‰์ด ์Šคํฌ๋กค๋ฉ๋‹ˆ๋‹ค. ์˜๊ฒฌ์ด๋‚˜ ์š”์ฒญ์ด ์žˆ๋Š” ๊ฒฝ์šฐ ์ด ๋ฌธ์˜ ์–‘์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์˜ํ•˜์‹ญ์‹œ์˜ค.

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