Can a black hole be destroyed? - Fabio Pacucci

1,779,435 views ใƒป 2019-05-16

TED-Ed


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค.

๋ฒˆ์—ญ: E N ๊ฒ€ํ† : Won Jang
00:06
Black holes are among the most destructive objects in the universe.
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๋ธ”๋ž™ํ™€์€ ์šฐ์ฃผ์—์„œ ๊ฐ€์žฅ ํŒŒ๊ดด์ ์ธ ๋ฌผ์ฒด๋“ค ์ค‘ ํ•˜๋‚˜์ž…๋‹ˆ๋‹ค.
00:11
Anything that gets too close to the central singularity of a black hole,
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๊ทธ ์–ด๋–ค ๊ฒƒ์ด๋ผ๋„ ๋ธ”๋ž™ํ™€์˜ ์ค‘์‹ฌ๋ถ€๋กœ ๋„ˆ๋ฌด ๊ฐ€๊นŒ์ด ๋‹ค๊ฐ€๊ฐ€๋ฉด
00:16
be it an asteroid, planet, or star,
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๊ทธ๊ฒƒ์ด ์†Œํ–‰์„ฑ, ํ–‰์„ฑ, ํ˜น์€ ๋ณ„์ด๋“ 
00:19
risks being torn apart by its extreme gravitational field.
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์—„์ฒญ๋‚œ ์ค‘๋ ฅ์žฅ์— ์˜ํ•ด ๊ฐˆ๊ธฐ๊ฐˆ๊ธฐ ์ฐข๊ฒจ์งˆ ์œ„ํ—˜์— ์ฒ˜ํ•˜๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
00:23
And if the approaching object happens to cross the black holeโ€™s event horizon,
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๋˜ํ•œ ๋งŒ์•ฝ์— ๋‹ค๊ฐ€์˜ค๋Š” ๋ฌผ์ฒด๊ฐ€ ๋ธ”๋ž™ํ™€์˜ ์‚ฌ๊ฑด์˜ ์ง€ํ‰์„ ์„ ์ง€๋‚˜๊ฒŒ ๋˜๋ฉด
00:28
itโ€™ll disappear and never re-emerge,
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๊ทธ๊ฒƒ์€ ์‚ฌ๋ผ์ ธ์„œ ๋‹ค์‹œ๋Š” ๋‚˜ํƒ€๋‚˜์ง€ ์•Š๊ณ 
00:31
adding to the black holeโ€™s mass and expanding its radius in the process.
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๋ธ”๋ž™ํ™€์˜ ์งˆ๋Ÿ‰์— ๋ณดํƒœ์–ด ๊ทธ๊ฒƒ์˜ ๋ฐ˜์ง€๋ฆ„์„ ์ฆ๊ฐ€์‹œํ‚ฌ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
00:36
There is nothing we could throw at a black hole
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์šฐ๋ฆฌ๊ฐ€ ๋˜์งˆ ์ˆ˜ ์žˆ๋Š” ๊ทธ ์–ด๋–ค ๊ฒƒ๋„
00:38
that would do the least bit of damage to it.
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๊ทธ๊ฒƒ์—๊ฒŒ ์กฐ๊ธˆ์ด๋ผ๋„ ํ”ผํ•ด๋ฅผ์ค„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.
00:41
Even another black hole wonโ€™t destroy itโ€“
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์‹ฌ์ง€์–ด ๋‹ค๋ฅธ ๋ธ”๋ž™ํ™€์กฐ์ฐจ๋„ ๊ทธ๊ฒƒ์„ ํŒŒ๊ดดํ•˜์ง€ ๋ชปํ•  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
00:43
the two will simply merge into a larger black hole,
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์ด ๋‘˜์€ ๊ทธ์ € ๋” ํฐ ๋ธ”๋ž™ํ™€๋กœ ํ•ฉ์ณ์ง€๊ณ 
00:47
releasing a bit of energy as gravitational waves in the process.
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๊ทธ ๊ณผ์ •์—์„œ ์ค‘๋ ฅ์žฅ์˜ ํ˜•ํƒœ๋กœ ์•ฝ๊ฐ„์˜ ์—๋„ˆ์ง€๋งŒ์„ ๋‚ด๋ฟœ์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
00:52
By some accounts,
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๋ช‡ ๊ฐ€์ง€ ๋ฌธํ—Œ์— ๋”ฐ๋ฅด๋ฉด
00:53
itโ€™s possible that the universe may eventually consist entirely of black holes
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์šฐ์ฃผ๊ฐ€ ๋‚˜์ค‘์—๋Š” ๋ธ”๋ž™ํ™€๋งŒ์œผ๋กœ ๊ฐ€๋“ ์ฐจ๋ฒ„๋ฆด ์ˆ˜๋„ ์žˆ๋‹ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค.
00:57
in a very distant future.
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์•„์ฃผ ๋จผ ๋ฏธ๋ž˜์—๋Š”์š”.
00:59
And yet, there may be a way to destroy, or โ€œevaporate,โ€ these objects after all.
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๊ทธ๋Ÿฌ๋‚˜ ์ด๋“ค์„ ํŒŒ๊ดด ํ˜น์€ "์ฆ๋ฐœ"์‹œํ‚ฌ ๋ฐฉ๋ฒ•์ด ์กด์žฌํ•  ์ง€๋„ ๋ชจ๋ฆ…๋‹ˆ๋‹ค.
01:05
If the theory is true,
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๋งŒ์•ฝ์— ์ด ์ด๋ก ์ด ์ •๋ง ์˜ณ๋‹ค๋ฉด
01:07
all we need to do is to wait.
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์šฐ๋ฆฌ๋Š” ๊ทธ์ € ๊ธฐ๋‹ค๋ฆฌ๊ธฐ๋งŒ ํ•˜๋ฉด ๋ฉ๋‹ˆ๋‹ค.
01:10
In 1974,
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1974๋…„์—๋Š”
01:11
Stephen Hawking theorized a process
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์Šคํ‹ฐ๋ธ ํ˜ธํ‚น ๋ฐ•์‚ฌ๊ฐ€ ๋ธ”๋ž™ํ™€์ด ์ ์ฐจ ์งˆ๋Ÿ‰์„ ์žƒ๋„๋ก ๋งŒ๋“ค ์ˆ˜ ์žˆ๋Š”
01:13
that could lead a black hole to gradually lose mass.
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๊ณผ์ •์— ๋Œ€ํ•œ ์ด๋ก ์„ ์„ธ์› ์Šต๋‹ˆ๋‹ค.
01:16
Hawking radiation, as it came to be known,
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ํ˜ธํ‚น ๋ณต์‚ฌ๋กœ ์•Œ๋ ค์ง„ ์ด ์ด๋ก ์€
01:19
is based on a well-established phenomenon called quantum fluctuations of the vacuum.
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๋„๋ฆฌ ํ™•๋ฆฝ๋œ ์ง„๊ณต์—์„œ์˜ ์–‘์ž์š”๋™์ด๋ผ๋Š” ํ˜„์ƒ์„ ๋ฐ”ํƒ•์œผ๋กœ ํ•ฉ๋‹ˆ๋‹ค.
01:25
According to quantum mechanics,
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์–‘์ž์—ญํ•™์— ๋”ฐ๋ฅด๋ฉด
01:27
a given point in spacetime fluctuates between multiple possible energy states.
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์‹œ๊ณต๊ฐ„์—์„œ์˜ ํ•œ ์‹œ์ ์€ ๊ฐ€๋Šฅํ•œ ์—ฌ๋Ÿฌ๊ฐ€์ง€ ์—๋„ˆ์ง€ ์ƒํƒœ ์‚ฌ์ด์—์„œ ์š”๋™์นฉ๋‹ˆ๋‹ค.
01:32
These fluctuations are driven by the continuous creation and destruction
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์ด ์š”๋™์€ ์ง€์†์ ์œผ๋กœ ๊ฐ€์ƒ์ž…์ž ์Œ์ด ์ƒ์„ฑ๋˜๊ณ  ํŒŒ๊ดด๋˜๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
01:37
of virtual particle pairs,
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01:39
which consist of a particle and its oppositely charged antiparticle.
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์ด ์Œ์€ ์ž…์ž ํ•˜๋‚˜์™€ ๋ฐ˜๋Œ€ ์ „ํ•˜๋ฅผ ๋„๋Š” ๋ฐ˜๋ฌผ์งˆ ์ž…์ž๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ์ง€์š”.
01:44
Normally, the two collide and annihilate each other shortly after appearing,
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๋ณดํ†ต ๊ทธ ๋‘˜์€ ๋‚˜ํƒ€๋‚œ ์ง€ ์–ผ๋งˆ ์•ˆ๋ผ ์ถฉ๋Œํ•˜์—ฌ ์„œ๋กœ๋ฅผ ์†Œ๋ฉธ์‹œํ‚ค๊ณ 
01:48
preserving the total energy.
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์—๋„ˆ์ง€์˜ ์ด๋Ÿ‰์„ ๋ณด์กดํ•ฉ๋‹ˆ๋‹ค.
01:50
But what happens when they appear just at the edge of a black holeโ€™s event horizon?
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๊ทธ๋Ÿฌ๋‚˜ ์ด๋“ค์ด ๋ธ”๋ž™ํ™€์˜ ์‚ฌ๊ฑด์˜ ์ง€ํ‰์„ ์˜ ๊ฐ€์žฅ์ž๋ฆฌ์— ๋‚˜ํƒ€๋‚œ๋‹ค๋ฉด ์–ด๋–ป๊ฒŒ ๋ ๊นŒ์š”?
01:56
If theyโ€™re positioned just right,
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๋งŒ์•ฝ์— ๊ทธ๋“ค์ด ๋”ฑ ๋งž๊ฒŒ ๋ฐฐ์น˜๋œ๋‹ค๋ฉด
01:58
one of the particles could escape the black holeโ€™s pull
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๋‘˜ ์ค‘ ํ•œ๊ฐœ์˜ ์ž…์ž๋Š” ๋ธ”๋ž™ํ™€์˜ ์ค‘๋ ฅ์„ ๋ฒ—์–ด๋‚˜๊ณ 
02:01
while its counterpart falls in.
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๋ฐ˜๋Œ€์ชฝ์€ ๋ธ”๋ž™ํ™€์— ๋นจ๋ ค๋“ค์–ด ๊ฐˆ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:04
It would then annihilate another oppositely charged particle
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๊ทธ ํ›„ ๋ธ”๋ž™ํ™€์˜ ์‚ฌ๊ฑด์˜ ์ง€ํ‰์„  ๋‚ด์˜ ๋‹ค๋ฅธ ๋ฐ˜๋Œ€ ์ „ํ•˜์˜ ์ž…์ž๋ฅผ ์†Œ๋ฉธ์‹œํ‚ค๊ณ 
02:08
within the event horizon of the black hole,
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02:10
reducing the black holeโ€™s mass.
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๋ธ”๋ž™ํ™€์˜ ์งˆ๋Ÿ‰์€ ์ค„์–ด๋“ค ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:12
Meanwhile, to an outside observer,
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์ด ๊ณผ์ •์ด ์™ธ๋ถ€์˜ ๊ด€์ฐฐ์ž์—๊ฒŒ๋Š”
02:14
it would look like the black hole had emitted the escaped particle.
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๋ธ”๋ž™ํ™€์ด ํƒˆ์ถœํ•œ ์ž…์ž๋ฅผ ๋ฐฉ์ถœํ•œ ๊ฒƒ ์ฒ˜๋Ÿผ ๋ณด์ผ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:19
Thus, unless a black hole continues to absorb additional matter and energy,
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๊ทธ๋Ÿฌ๋‹ˆ ๋ธ”๋ž™ํ™€์ด ์ถ”๊ฐ€์ ์ธ ๋ฌผ์งˆ๊ณผ ์—๋„ˆ์ง€๋ฅผ ํก์ˆ˜ํ•˜์ง€ ์•Š๋Š” ์ด์ƒ
02:24
itโ€™ll evaporate particle by particle, at an excruciatingly slow rate.
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์—„์ฒญ๋‚˜๊ฒŒ ๋Š๋ฆฐ ์†๋„๋กœ ์ž…์ž ํ•˜๋‚˜์”ฉ ์ฆ๋ฐœํ•ด ๋ฒ„๋ฆด ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:30
How slow?
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์–ผ๋งˆ๋‚˜ ๋Š๋ฆฌ๊ฒŒ๋ƒ๊ณ ์š”?
02:31
A branch of physics, called black hole thermodynamics, gives us an answer.
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๋ฌผ๋ฆฌํ•™์˜ ์ผ์ข…์ธ ๋ธ”๋ž™ํ™€ ์—ด์—ญํ•™์ด ์šฐ๋ฆฌ์—๊ฒŒ ๋‹ต์„ ์ค„ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
02:36
When everyday objects or celestial bodies release energy to their environment,
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์ผ์ƒ์ ์ธ ์‚ฌ๋ฌผ์ด๋‚˜ ์ฒœ์ฒด๊ฐ€ ์ž์‹ ์˜ ์ฃผ๋ณ€ ํ™˜๊ฒฝ์— ์—๋„ˆ์ง€๋ฅผ ๋ฐฉ์ถœํ• ๋•Œ
02:41
we perceive that as heat,
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์šฐ๋ฆฌ๋Š” ๊ทธ๊ฒƒ์„ ์—ด๋กœ ์ธ์‹ํ•ฉ๋‹ˆ๋‹ค.
02:43
and can use their energy emission to measure their temperature.
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๊ทธ๋ฆฌ๊ณ  ๊ทธ๋“ค์˜ ์—๋„ˆ์ง€ ๋ฐฉ์ถœ์„ ์ด์šฉํ•˜์—ฌ ์˜จ๋„๋ฅผ ์ธก์ •ํ• ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
02:47
Black hole thermodynamics
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๋ธ”๋ž™ํ™€ ์—ด์—ญํ•™์€
02:48
suggests that we can similarly define the โ€œtemperatureโ€ of a black hole.
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์šฐ๋ฆฌ๊ฐ€ ๋น„์Šทํ•œ ๋ฐฉ๋ฒ•์œผ๋กœ ๋ธ”๋ž™ํ™€์˜ "์˜จ๋„"๋ฅผ ๊ฐ€๋Š ํ•  ์ˆ˜ ์žˆ๋‹ค๋Š” ์ ์„ ์ œ์‹œํ•ฉ๋‹ˆ๋‹ค.
02:53
It theorizes that the more massive the black hole,
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๊ทธ๊ฒƒ์€ ๋ธ”๋ž™ํ™€์ด ๋” ๊ฑฐ๋Œ€ํ• ์ˆ˜๋ก
02:56
the lower its temperature.
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์˜จ๋„๊ฐ€ ๋” ๋‚ฎ๋‹ค๋Š” ์ ์„ ์ด๋ก ์ ์œผ๋กœ ์ฆ๋ช…ํ•ด ์ค๋‹ˆ๋‹ค.
02:58
The universeโ€™s largest black holes
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์šฐ์ฃผ์˜ ๊ฐ€์žฅ ํฐ ๋ธ”๋ž™ํ™€๋“ค์€
03:00
would give off temperatures of the order of 10 to the -17th power Kelvin,
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10์˜ -17์Šน ์ผˆ๋นˆ ๋งŒํผ์˜ ์˜จ๋„๋ฅผ ๊ฐ€์งˆ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
03:06
very close to absolute zero.
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์ด๋Š” ์ ˆ๋Œ€ 0๋„์™€ ์•„์ฃผ ๊ฐ€๊นŒ์šด ์ˆ˜์น˜์ž…๋‹ˆ๋‹ค.
03:08
Meanwhile, one with the mass of the asteroid Vesta
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๋ฐ˜๋ฉด ์†Œํ–‰์„ฑ ๋ฒ ์Šคํƒ€ ์ •๋„์˜ ์งˆ๋Ÿ‰์„ ๊ฐ€์ง„ ๊ฒƒ์€
03:12
would have a temperature close to 200 degrees Celsius,
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์„ญ์”จ 200๋„์— ๊ฐ€๊นŒ์šด ์˜จ๋„๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ์œผ๋ฉฐ
03:16
thus releasing a lot of energy in the form of Hawking Radiation
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๋งŽ์€ ์—๋„ˆ์ง€๋ฅผ ํ˜ธํ‚น ๋ณต์‚ฌ์˜ ํ˜•ํƒœ๋กœ
03:20
to the cold outside environment.
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์ถ”์šด ๋ฐ”๊นฅ ํ™˜๊ฒฝ์œผ๋กœ ๋ฐฉ์ถœ ํ•  ๊ฒƒ์ž…๋‹ˆ๋‹ค.
03:23
The smaller the black hole,
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๋ธ”๋ž™ํ™€์ด ์ž‘์„์ˆ˜๋ก
03:24
the hotter it seems to be burningโ€“
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๊ทธ๊ฒƒ์ด ๋” ๋œจ๊ฒ๊ฒŒ ํƒ€์˜ค๋ฅด๋Š” ๊ฒƒ ์ฒ˜๋Ÿผ ๋ณด์ž…๋‹ˆ๋‹ค.
03:26
and the sooner itโ€™ll burn out completely.
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๊ทธ๋ฆฌ๊ณ  ๋” ๋นจ๋ฆฌ ์™„์ „ํžˆ ํƒ€๋ฒ„๋ฆด ๊ฒƒ์ž…๋‹ˆ๋‹ค.
03:29
Just how soon?
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์–ผ๋งˆ๋‚˜ ๋นจ๋ฆฌ๋ƒ๊ณ ์š”?
03:30
Well, donโ€™t hold your breath.
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๊ธ€์Ž„, ๋„ˆ๋ฌด ๊ธฐ๋Œ€๋Š” ํ•˜์‹œ์ง€ ๋งˆ์‹œ๊ตฌ์š”.
03:32
First of all, most black holes accrete, or absorb matter and energy,
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๋จผ์ € ๋Œ€๋ถ€๋ถ„์˜ ๋ธ”๋ž™ํ™€๋“ค์€ ๋ฌผ์งˆ๊ณผ ์—๋„ˆ์ง€๋ฅผ ํก์ˆ˜ํ•˜๋ฉฐ ๋ถ€ํ’€์–ด ์˜ค๋ฆ…๋‹ˆ๋‹ค.
03:37
more quickly than they emit Hawking radiation.
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๊ทธ ์†๋„๋Š” ๊ทธ๋“ค์ด ํ˜ธํ‚น ๋ณต์‚ฌ๋ฅผ ๋ฐฉ์ถœํ•˜๋Š” ๊ฒƒ๋ณด๋‹ค ๋น ๋ฅด์ง€์š”.
03:40
But even if a black hole with the mass of our Sun stopped accreting,
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ํ•˜์ง€๋งŒ ์šฐ๋ฆฌ์˜ ํƒœ์–‘์˜ ์งˆ๋Ÿ‰์„ ๊ฐ€์ง„ ๋ธ”๋ž™ํ™€์ด ๋ถ€ํ‘ธ๋Š” ๊ฒƒ์„ ๋ฉˆ์ถ”๋Š”๋ฐ์—๋„
03:45
it would take 10 to the 67th power yearsโ€“
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์•ฝ 10์˜ 67์Šน ๋…„์ด ๊ฑธ๋ฆด ๊ฒƒ์ž…๋‹ˆ๋‹ค.
03:48
many many magnitudes longer than the current age of the Universeโ€”
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ํ˜„์žฌ ์šฐ์ฃผ์˜ ๋‚˜์ด๋ณด๋‹ค ํ›จ์”ฌ ๊ธด ์‹œ๊ฐ„์ด์ง€๋‚˜์•ผ
03:53
to fully evaporate.
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์™„์ „ํžˆ ํƒ€๋ฒ„๋ฆด ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
03:54
When a black hole reaches about 230 metric tons,
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๋ธ”๋ž™ํ™€์ด ๋ฏธํ„ฐ๋ฒ• ๊ธฐ์ค€์œผ๋กœ ์•ฝ 230 ํ†ค์— ๋‹ค๋‹ค๋ฅด๋ฉด
03:58
itโ€™ll have only one more second to live.
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๊ทธ๊ฒƒ์˜ ์ˆ˜๋ช…์€ 1์ดˆ์˜ ๋ฐ–์— ์•ˆ ๋‚จ์•˜์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค.
04:02
In that final second,
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๊ทธ ์ตœํ›„์˜ 1์ดˆ ๋™์•ˆ
04:03
its event horizon becomes increasingly tiny,
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์‚ฌ๊ฑด์˜ ์ง€ํ‰์„ ์€ ๊ณ„์† ์ž‘์•„์ง€๊ณ 
04:06
until finally releasing all of its energy back into the universe.
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๊ฒฐ๊ตญ ์šฐ์ฃผ์— ์ž์‹ ์˜ ๋ชจ๋“  ์—๋„ˆ์ง€๋ฅผ ๋ฐฉ์ถœํ•˜๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
04:11
And while Hawking radiation has never been directly observed,
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๋˜ํ•œ ํ˜ธํ‚น ๋ณต์‚ฌ๋Š” ์ง์ ‘์ ์œผ๋กœ ๊ด€์ฐฐ๋œ ์ ์ด ์—†์ง€๋งŒ
04:14
some scientists believe that certain gamma ray flashes detected in the sky
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๋ช‡๋ช‡ ๊ณผํ•™์ž๋“ค์€ ํ•˜๋Š˜์—์„œ ๊ด€์ฐฐ๋˜๋Š” ํŠน์ • ๊ฐ๋งˆ์„  ํญ๋ฐœ๋“ค์ด
04:19
are actually traces of the last moments
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์‹ค์ œ๋ก  ์‹œ๊ฐ„์˜ ์‹œ์ดˆ์— ์ƒ์„ฑ๋œ ๋ช‡๊ฐœ์˜ ์ž‘์€ ์›์‹œ ๋ธ”๋ž™ํ™€๋“ค์˜
04:22
of small, primordial black holes formed at the dawn of time.
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์ตœํ›„์˜ ์ˆœ๊ฐ„์˜ ํ”์ ์ด๋ผ๊ณ  ๋ฏฟ์Šต๋‹ˆ๋‹ค.
04:28
Eventually, in an almost inconceivably distant future,
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๊ฒฐ๊ตญ์—๋Š” ๊ฑฐ์˜ ์…€ ์ˆ˜๋„ ์—†์ด ๋จผ ๋ฏธ๋ž˜์—๋Š”
04:32
the universe may be left as a cold and dark place.
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์šฐ์ฃผ๋Š” ์ถฅ๊ณ  ์–ด๋‘์šด ๊ณต๊ฐ„์œผ๋กœ ๋‚จ์„ ์ง€๋„ ๋ชจ๋ฆ…๋‹ˆ๋‹ค.
04:36
But if Stephen Hawking was right,
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ํ•˜์ง€๋งŒ ๋งŒ์•ฝ ์Šคํ‹ฐ๋ธ ํ˜ธํ‚น์ด ์˜ณ๋‹ค๋ฉด
04:37
before that happens,
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๊ทธ๋Ÿฐ ์ผ์ด ์ƒ๊ธฐ๊ธฐ ์ „์—
04:39
the normally terrifying and otherwise impervious black holes
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๋ฌด์‹œ๋ฌด์‹œํ•˜๊ณ  ์˜์› ํ•  ์ค„์•Œ์•˜๋˜ ๋ธ”๋ž™ํ™€๋“ค์ด
04:43
will end their existence in a final blaze of glory.
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์ตœํ›„์˜ ์„ฌ๊ด‘ ์†์—์„œ ์ž์‹ ๋“ค์˜ ์กด์žฌ๋ฅผ ์˜๊ด‘์Šค๋Ÿฝ๊ฒŒ ๋งˆ์น  ๊ฒƒ์ž…๋‹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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