Aomawa Shields: How we'll find life on other planets | TED

113,799 views ・ 2016-01-28

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μ•„λž˜ μ˜λ¬Έμžλ§‰μ„ λ”λΈ”ν΄λ¦­ν•˜μ‹œλ©΄ μ˜μƒμ΄ μž¬μƒλ©λ‹ˆλ‹€.

λ²ˆμ—­: Yeram Ha κ²€ν† : jonghyeok lee
00:12
I am in search of another planet in the universe where life exists.
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μ €λŠ” μš°μ£Όμ—μ„œ 생λͺ…이 μ‘΄μž¬ν•˜λŠ” 또 λ‹€λ₯Έ 행성을 μ°Ύκ³  μžˆμŠ΅λ‹ˆλ‹€.
00:18
I can't see this planet with my naked eyes
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맨 λˆˆμœΌλ‘œλŠ” 이 행성이 μ•ˆλ³΄μž…λ‹ˆλ‹€.
00:21
or even with the most powerful telescopes
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μš°λ¦¬κ°€ ν˜„μž¬ κ°–κ³  μžˆλŠ” 아무리 κ°•λ ₯ν•œ 망원경이라도
00:23
we currently possess.
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이 행성은 보이지 μ•ŠμŠ΅λ‹ˆλ‹€.
00:25
But I know that it's there.
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ν•˜μ§€λ§Œ μ €λŠ” 그것이 μ‘΄μž¬ν•œλ‹€λŠ”κ±Έ μ•Œκ³  μžˆμŠ΅λ‹ˆλ‹€.
00:27
And understanding contradictions that occur in nature
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그리고 μžμ—°μ—μ„œ μΌμ–΄λ‚˜λŠ” λͺ¨μˆœμ„ μ΄ν•΄ν•˜λŠ” 것은
00:31
will help us find it.
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μš°λ¦¬λ“€μ΄ 그것을 λ°œκ²¬ν•˜λŠ”λ° 도움이 될 κ²ƒμž…λ‹ˆλ‹€.
00:33
On our planet,
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우리 행성은
00:34
where there's water, there's life.
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물이 있고, 생λͺ…이 μžˆλŠ” κ³³μž…λ‹ˆλ‹€.
00:36
So we look for planets that orbit at just the right distance
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κ·Έλž˜μ„œ μš°λ¦¬λŠ” 단지 κ·Έλ“€μ˜ λ³„μ—μ„œ μ λ‹Ήν•œ 거리둜 ꢀ도λ₯Ό λ„λŠ”
00:39
from their stars.
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행성을 μ°ΎμŠ΅λ‹ˆλ‹€.
00:42
At this distance,
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이정도 κ±°λ¦¬μ—μ„œλŠ”,
00:43
shown in blue on this diagram for stars of different temperatures,
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이 ν‘œμ—μ„œ νŒŒλž€μƒ‰μœΌλ‘œ ν‘œμ‹œλœ κ±°λ¦¬λŠ” λ‹€μ–‘ν•œ μ˜¨λ„μ˜ ν•­μ„±λ“€λ‘œλΆ€ν„°
00:47
planets could be warm enough for water to flow on their surfaces
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행성이 μ λ‹Ήνžˆ λ–¨μ–΄μ Έ μžˆμ–΄μ„œ μ§€ν‘œμ— 물이 흐λ₯Όλ§ŒνΌ λ”°λœ»ν•œ κ²ƒμž…λ‹ˆλ‹€.
00:50
as lakes and oceans
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ν˜Έμˆ˜μ™€ 바닀같은 것이 μ‘΄μž¬ν•΄μ„œ 생λͺ…체가 κ±°μ£Όν•  수 μžˆλŠ” 것이죠.
00:52
where life might reside.
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00:54
Some astronomers focus their time and energy on finding planets
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λͺ‡λͺ‡ μ²œλ¬Έν•™μžλ“€μ€ κ·Έλ“€μ˜ μ‹œκ°„κ³Ό νž˜μ„ κ·Έλ“€ λ³„λ‘œλΆ€ν„° 이 거리에 μžˆλŠ”
00:58
at these distances from their stars.
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행성듀을 μ°ΎλŠ”λ° μ§‘μ€‘ν•©λ‹ˆλ‹€.
01:00
What I do picks up where their job ends.
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그듀이 일을 λλ‚΄λŠ” κ³³μ—μ„œ μ €λŠ” 일을 μ‹œμž‘ν•©λ‹ˆλ‹€.
01:03
I model the possible climates of exoplanets.
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μ €λŠ” νƒœμ–‘κ³„μ™Έ ν–‰μ„±μ—μ„œ λ°œμƒν–ˆμ„ κΈ°ν›„λ₯Ό μ‹€μ¦ν•©λ‹ˆλ‹€.
01:07
And here's why that's important:
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그것이 μ™œ μ€‘μš”ν•œμ§€ λ§μ”€λ“œλ¦¬μ£ .
01:09
there are many factors besides distance from its star
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λ³„λ“€λ‘œλΆ€ν„°μ˜ 거리 외에 λ§Žμ€ μš”μΈλ“€μ΄ μžˆλŠ”λ°,
01:12
that control whether a planet can support life.
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κ·Έ μš”μΈλ“€μ€ 행성이 생λͺ…체λ₯Ό μƒμ‘΄μ‹œν‚¬ 수 μžˆλŠ”μ§€μ— κ΄€μ—¬ν•©λ‹ˆλ‹€.
01:16
Take the planet Venus.
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κΈˆμ„±μ„ λ“€μ–΄λ΄…μ‹œλ‹€.
01:18
It's named after the Roman goddess of love and beauty,
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이 행성은 둜마 μ‹ ν™”μ˜ μ‚¬λž‘κ³Ό 미의 μ—¬μ‹  이름을 λ•„μŠ΅λ‹ˆλ‹€.
01:22
because of its benign, ethereal appearance in the sky.
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μ™œλƒν•˜λ©΄ ν•˜λŠ˜μ—μ„œ λ³΄μ΄λŠ” λͺ¨μŠ΅μ΄ μ˜¨ν™”ν•˜κ³  아름닀웠기 λ•Œλ¬Έμ΄μ—ˆμŠ΅λ‹ˆλ‹€.
01:26
But spacecraft measurements revealed a different story.
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ν•˜μ§€λ§Œ μš°μ£Όμ„  μΈ‘μ • κ²°κ³ΌλŠ” μ‹€μ œ 사정이 닀름을 λ°ν˜€λƒˆμŠ΅λ‹ˆλ‹€.
01:30
The surface temperature is close to 900 degrees Fahrenheit,
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ν‘œλ©΄μ˜¨λ„λŠ” 화씨 900도,
01:34
500 Celsius.
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섭씨 500도에 κ°€κΉμŠ΅λ‹ˆλ‹€.
01:36
That's hot enough to melt lead.
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이 μ˜¨λ„λŠ” 납을 녹일 만큼 μΆ©λΆ„νžˆ λœ¨κ²μŠ΅λ‹ˆλ‹€.
01:39
Its thick atmosphere, not its distance from the sun, is the reason.
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νƒœμ–‘μœΌλ‘œλΆ€ν„°μ˜ 거리가 μ•„λ‹ˆλΌ ν–‰μ„±μ˜ λ‘κΊΌμš΄ λŒ€κΈ°κ°€ κ·Έ μ›μΈμž…λ‹ˆλ‹€.
01:42
It causes a greenhouse effect on steroids,
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이것은 μ˜¨μ‹€νš¨κ³Όλ₯Ό λ§Œλ“€μ–΄λ‚΄λŠ”λ°,
01:46
trapping heat from the sun and scorching the planet's surface.
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νƒœμ–‘μ˜ 열을 가두고, ν–‰μ„±μ˜ ν‘œλ©΄μ„ νƒœμ›Œλ²„λ¦½λ‹ˆλ‹€.
01:50
The reality totally contradicted initial perceptions of this planet.
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이 사싀은 ν–‰μ„±μ˜ 초기 인식과 μ „λ©΄ λͺ¨μˆœλ©λ‹ˆλ‹€.
01:55
From these lessons from our own solar system,
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우리 νƒœμ–‘κ³„μ—μ„œ 얻은 이런 κ΅ν›ˆμ—μ„œ
01:58
we've learned that a planet's atmosphere
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μš°λ¦¬λŠ” ν–‰μ„±μ˜ λŒ€κΈ°κ°€
02:00
is crucial to its climate and potential to host life.
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기후에 μ€‘λŒ€ν•œ 영ν–₯을 미치고 삢을 μœ μΉ˜ν•  수 μžˆμŒμ„ μ•Œκ²Œ λ©λ‹ˆλ‹€.
02:04
We don't know what the atmospheres of these planets are like
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μš°λ¦¬λŠ” 이 ν–‰μ„±λ“€μ˜ λŒ€κΈ°κ°€ 어떀지 μ•Œμ§€ λͺ»ν•©λ‹ˆλ‹€.
02:07
because the planets are so small and dim compared to their stars
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μ™œλƒν•˜λ©΄ 행성듀은 κ·Έλ“€μ˜ 별에 λΉ„ν•΄ 맀우 μž‘κ³  μ–΄λ‘‘μŠ΅λ‹ˆλ‹€.
02:12
and so far away from us.
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그리고 μš°λ¦¬μ™€ μ•„μ£Ό 멀리 λ–¨μ–΄μ Έ μžˆκΈ°λ„ ν•©λ‹ˆλ‹€.
02:14
For example, one of the closest planets that could support surface water --
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예λ₯Ό λ“€μ–΄, κ°€μž₯ κ°€κΉŒμš΄ 행성쀑 ν•˜λ‚˜κ°€ ν‘œλ©΄μ— 물을 곡급할 수 μžˆλŠ”λ°,
02:18
it's called Gliese 667 Cc --
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이것을 κΈ€λ¦¬μ œ 667씨씨(Cc)라고 λΆ€λ¦…λ‹ˆλ‹€.
02:22
such a glamorous name, right, nice phone number for a name --
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마치 ν™”λ €ν•œ 이름과 그런 이름에 멋진 μ „ν™”λ²ˆν˜Έμ²˜λŸΌ λ§μž…λ‹ˆλ‹€.
02:26
it's 23 light years away.
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이것은 23κ΄‘λ…„ λ–¨μ–΄μ Έ μžˆμŠ΅λ‹ˆλ‹€.
02:29
So that's more than 100 trillion miles.
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100μ‘° λ§ˆμΌλ³΄λ‹€ 더 멀리 λ–¨μ–΄μ Έ μžˆμŠ΅λ‹ˆλ‹€.
02:32
Trying to measure the atmospheric composition
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μ†Œμ† ν•­μ„± μ•žμ„ μ§€λ‚˜λŠ” νƒœμ–‘κ³„ μ™Έ ν–‰μ„±μ˜ λŒ€κΈ° ꡬ성 성뢄을
02:35
of an exoplanet passing in front of its host star is hard.
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μΈ‘μ •ν•˜λ €λŠ” 것은 μ–΄λ €μš΄ μΌμž…λ‹ˆλ‹€.
02:39
It's like trying to see a fruit fly
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이것은 마치 μ°¨ ν—€λ“œλΌμ΄νŠΈ μ•žμ„ μ§€λ‚˜λŠ” 초파리λ₯Ό
02:41
passing in front of a car's headlight.
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λ³΄λ €λŠ” 것과 κ°™μŠ΅λ‹ˆλ‹€.
02:44
OK, now imagine that car is 100 trillion miles away,
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μ’‹μŠ΅λ‹ˆλ‹€, 이제 100μ‘° 마일 λ–¨μ–΄μ Έ μžˆλŠ” μ°¨λ₯Ό μƒμƒν•©μ‹œλ‹€.
02:47
and you want to know the precise color of that fly.
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μ—¬λŸ¬λΆ„μ€ κ·Έ 초파리의 μ •ν™•ν•œ 색상을 μ•Œκ³ μž ν•©λ‹ˆλ‹€.
02:52
So I use computer models
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κ·Έλž˜μ„œ μ €λŠ” 컴퓨터λͺ¨λΈμ„
02:54
to calculate the kind of atmosphere a planet would need
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λ¬Όκ³Ό 생λͺ…이 μ‘΄μž¬ν•˜κΈ° μ ν•©ν•œ κΈ°ν›„λ₯Ό 가진 행성이 ν•„μš”λ‘œ ν•˜λŠ”
02:57
to have a suitable climate for water and life.
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λŒ€κΈ°μ˜ μ’…λ₯˜λ₯Ό κ³„μ‚°ν•˜λŠ”λ° μ΄μš©ν•©λ‹ˆλ‹€.
03:01
Here's an artist's concept of the planet Kepler-62f,
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이것은 지ꡬ와 비ꡐ해 보기 μœ„ν•΄ μΌ€ν”ŒλŸ¬-62에프(f) 행성을
03:05
with the Earth for reference.
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미적으둜 ν‘œν˜„ν•΄ λ³Έ κ²ƒμž…λ‹ˆλ‹€.
03:07
It's 1,200 light years away,
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이 행성은 1200κ΄‘λ…„ 멀리 λ–¨μ–΄μ Έ μžˆμŠ΅λ‹ˆλ‹€.
03:09
and just 40 percent larger than Earth.
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그리고 지ꡬ보닀 40% 정도 더 ν½λ‹ˆλ‹€.
03:12
Our NSF-funded work found that it could be warm enough for open water
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우리의 NSF에 투자된 νšŒμ‚¬λŠ” λ‹€μ–‘ν•œ λŒ€κΈ° μ’…λ₯˜μ™€ ꢀ도 λ°©ν–₯μ—μ„œ
03:16
from many types of atmospheres and orientations of its orbit.
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물을 λ‚˜μ˜¬λ§ŒνΌ μΆ©λΆ„νžˆ λ”°λœ»ν•˜λ‹€λŠ” 것을 κΉ¨λ‹¬μ•˜μŠ΅λ‹ˆλ‹€.
03:20
So I'd like future telescopes to follow up on this planet
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κ·Έλž˜μ„œ μ €λŠ” 미래 ν˜„λ―Έκ²½μ΄ 생λͺ…μ˜ μ‹ ν˜Έλ₯Ό μ°ΎκΈ° μœ„ν•΄
03:23
to look for signs of life.
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이 행성을 μ«“μ•„κ°€κΈΈ λ°”λžλ‹ˆλ‹€.
03:26
Ice on a planet's surface is also important for climate.
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ν–‰μ„± ν‘œλ©΄μ˜ μ–ΌμŒ λ˜ν•œ 기후에 μ€‘μš”ν•œ 영ν–₯을 λ―ΈμΉ©λ‹ˆλ‹€.
03:29
Ice absorbs longer, redder wavelengths of light,
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μ–ΌμŒμ€ 더 κΈΈκ³ , 뢉은 λΉ›νŒŒμž₯을 ν‘μˆ˜ν•˜κ³ 
03:33
and reflects shorter, bluer light.
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더 짧고 ν‘Έλ₯Έ 빛을 λ°˜μ‚¬ν•©λ‹ˆλ‹€.
03:35
That's why the iceberg in this photo looks so blue.
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이것이 이 μ‚¬μ§„μ—μ„œ 빙산이 ν‘Έλ₯΄κ²Œ λ³΄μ΄λŠ” μ΄μœ μž…λ‹ˆλ‹€.
03:39
The redder light from the sun is absorbed on its way through the ice.
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νƒœμ–‘μ—μ„œ μ˜€λŠ” 뢉은 빛은 μ–ΌμŒμ„ ν†΅κ³Όν•˜λ©΄μ„œ ν‘μˆ˜λ©λ‹ˆλ‹€.
03:42
Only the blue light makes it all the way to the bottom.
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ν‘Έλ₯Έ λΉ›λ§Œμ΄ λ°”λ‹₯κΉŒμ§€ μ„±κ³΅μ μœΌλ‘œ 닿을 수 μžˆμŠ΅λ‹ˆλ‹€.
03:45
Then it gets reflected back to up to our eyes
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κ·Έ ν›„ 우리 λˆˆμ— λ°˜μ‚¬λ˜μ–΄ λŒμ•„μ˜€κ²Œ 되고
03:48
and we see blue ice.
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μš°λ¦¬λŠ” ν‘Έλ₯Έμƒ‰ μ–ΌμŒμ„ 보게 λ˜λŠ” κ²ƒμž…λ‹ˆλ‹€.
03:50
My models show that planets orbiting cooler stars
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제 λͺ¨λΈμ€ μ°¨κ°€μš΄ λ³„μ˜ ꢀ도λ₯Ό λ„λŠ” 행성듀이
03:53
could actually be warmer than planets orbiting hotter stars.
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μ‹€μ œλ‘œ 뜨거운 별을 λ„λŠ” 행성보닀 더 λ”°λœ»ν•  수 μžˆλ‹€λŠ” 것을 λ³΄μ—¬μ€λ‹ˆλ‹€.
03:56
There's another contradiction --
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또 λ‹€λ₯Έ λͺ¨μˆœμ΄ μžˆλŠ”λ°,
03:58
that ice absorbs the longer wavelength light from cooler stars,
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μ–ΌμŒμ€ μ°¨κ°€μš΄ λ³„μ—μ„œ 더 κΈ΄ 파μž₯의 빛을 ν‘μˆ˜ν•˜κ³ 
04:02
and that light, that energy, heats the ice.
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κ·Έ λΉ›, κ·Έ μ—λ„ˆμ§€λŠ” μ–ΌμŒμ— 열을 κ°€ν•©λ‹ˆλ‹€.
04:06
Using climate models to explore
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이런 λͺ¨μˆœλ“€μ΄ ν–‰μ„±μ˜ 기후에 μ–΄λ–»κ²Œ 영ν–₯을 λ―ΈμΉ˜λŠ”μ§€λ₯Ό νƒκ΅¬ν•˜λŠ”
04:09
how these contradictions can affect planetary climate
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κΈ°ν›„λͺ¨λΈμ„ μ‚¬μš©ν•˜λŠ” 것은
04:12
is vital to the search for life elsewhere.
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μ–΄λ”˜κ°€ μžˆμ„ 생λͺ…을 μ°ΎλŠ”λ° ν•„μˆ˜μ μž…λ‹ˆλ‹€.
04:16
And it's no surprise that this is my specialty.
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그리고 이건 제 전문이기 λ•Œλ¬Έμ— λ†€λž„ ν•„μš”κ°€ μ—†μŠ΅λ‹ˆλ‹€.
04:19
I'm an African-American female astronomer
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μ €λŠ” 아프리카 κ³„ν†΅μ˜ 미ꡭ인 μ—¬μ„± μ²œλ¬Έν•™μžμ΄κ³ 
04:22
and a classically trained actor
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ν™”μž₯ν•˜κ³  νŒ¨μ…˜μž‘μ§€ μ½λŠ” 것을 μ’‹μ•„ν•˜λŠ”
04:24
who loves to wear makeup and read fashion magazines,
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μ •μ‹μœΌλ‘œ ν›ˆλ ¨ 받은 λŒ€μ›μž…λ‹ˆλ‹€.
04:28
so I am uniquely positioned to appreciate contradictions in nature --
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κ·Έλž˜μ„œ μ €λŠ” μžμ—°μ  λͺ¨μˆœμ„ μΈμ •ν•˜λŠ” 것에 λ…νŠΉν•˜κ²Œ 자리λ₯Ό 작고 μžˆμŠ΅λ‹ˆλ‹€.
04:33
(Laughter)
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(μ›ƒμŒ)
04:34
(Applause)
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(λ°•μˆ˜)
04:38
... and how they can inform our search for the next planet where life exists.
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생λͺ…이 μžˆλŠ” λ‹€μŒ ν–‰μ„±μœΌλ‘œμ˜ 탐색을 그듀이 μ–΄λ–»κ²Œ μ•Œ 수 μžˆλŠ”μ§€λ„ λ§μž…λ‹ˆλ‹€.
04:42
My organization, Rising Stargirls,
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제 쑰직, 라이징 μŠ€νƒ€κ±Έμ¦ˆλŠ”
04:45
teaches astronomy to middle-school girls of color,
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μœ μƒ‰μΈμ’… 쀑학생 μ†Œλ…€μ—κ²Œ μ²œλ¬Έν•™μ„ κ°€λ₯΄μΉ˜λŠ”데에
04:48
using theater, writing and visual art.
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μ—°κ·Ή, μž‘λ¬Έκ³Ό μ‹œκ°μ  μ˜ˆμˆ μ„ μ΄μš©ν•©λ‹ˆλ‹€.
04:52
That's another contradiction -- science and art don't often go together,
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λ‹€λ₯Έ λͺ¨μˆœμ΄ μžˆμŠ΅λ‹ˆλ‹€. κ³Όν•™κ³Ό 예술이 μ’…μ’… ν•¨κ»˜ 가지 μ•ŠμŠ΅λ‹ˆλ‹€.
04:56
but interweaving them can help these girls bring their whole selves
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ν•˜μ§€λ§Œ 그듀을 μ„žλŠ” 것은 이 μ†Œλ…€λ“€μ΄ μ˜¨μ „νžˆ κ·Έλ“€ 슀슀둜
05:00
to what they learn,
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λ°°μš°λŠ” 것에 도움이 λ©λ‹ˆλ‹€.
05:01
and maybe one day join the ranks of astronomers
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그리고 μ•„λ§ˆλ„ μ–΄λŠ λ‚  λͺ¨μˆœμœΌλ‘œ 가득찬
05:05
who are full of contradictions,
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μ²œλ¬Έν•™μžλ“€ μˆœμœ„μ— μ§„μž…ν•˜κ³ 
05:06
and use their backgrounds to discover, once and for all,
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ν•œλ²ˆ, ν˜Ήμ€ λͺ¨λ‘ μš°λ¦¬κ°€ μ§„μ§œ μš°μ£Όμ—μ„œ ν˜Όμžκ°€ μ•„λ‹ˆλΌλŠ” κ±Έ
05:10
that we are truly not alone in the universe.
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μ°Ύμ•„λ‚΄λŠ”λ° κ·Έλ“€μ˜ 배경을 μ‚¬μš©ν•  κ²ƒμž…λ‹ˆλ‹€.
05:14
Thank you.
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κ°μ‚¬ν•©λ‹ˆλ‹€.
05:15
(Applause)
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(λ°•μˆ˜)
이 μ›Ήμ‚¬μ΄νŠΈ 정보

이 μ‚¬μ΄νŠΈλŠ” μ˜μ–΄ ν•™μŠ΅μ— μœ μš©ν•œ YouTube λ™μ˜μƒμ„ μ†Œκ°œν•©λ‹ˆλ‹€. μ „ 세계 졜고의 μ„ μƒλ‹˜λ“€μ΄ κ°€λ₯΄μΉ˜λŠ” μ˜μ–΄ μˆ˜μ—…μ„ 보게 될 κ²ƒμž…λ‹ˆλ‹€. 각 λ™μ˜μƒ νŽ˜μ΄μ§€μ— ν‘œμ‹œλ˜λŠ” μ˜μ–΄ μžλ§‰μ„ 더블 ν΄λ¦­ν•˜λ©΄ κ·Έκ³³μ—μ„œ λ™μ˜μƒμ΄ μž¬μƒλ©λ‹ˆλ‹€. λΉ„λ””μ˜€ μž¬μƒμ— 맞좰 μžλ§‰μ΄ μŠ€ν¬λ‘€λ©λ‹ˆλ‹€. μ˜κ²¬μ΄λ‚˜ μš”μ²­μ΄ μžˆλŠ” 경우 이 문의 양식을 μ‚¬μš©ν•˜μ—¬ λ¬Έμ˜ν•˜μ‹­μ‹œμ˜€.

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