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  • There are still lots of things about space

    關於太空有許多事情

  • that we may never be able to answer,

    可能永遠無法解答

  • like is time travel possible?

    像時間旅行有可能嗎?

  • Or are aliens living somewhere else in the Milky Way?

    或銀河系裡有外星人嗎?

  • But there is one thing I believe about space:

    但我相信一件關於太空的事:

  • Space is trying to kill me.

    太空想殺我

  • Space isn't out to get me personally.

    它不只想殺我

  • It's also trying to kill you and everybody else.

    也想殺你和每個人

  • Think about it.

    想想看

  • Space doesn't naturally have what we need to survive

    太空不會自然供應生存必需品

  • when we travel there:

    讓我們進行太空旅行

  • no air,

    沒有空氣、

  • it's too hot

    有時太熱、

  • or too cold,

    有時太冷、

  • no ozone to protect us from those nasty UV rays, either.

    沒有臭氧層可阻擋惱人的紫外線

  • This all sounds bad,

    這一切聽起來都很糟

  • but what can space really do to me

    但太空能對我怎樣

  • if I stay on Earth?

    如果我待在地球上呢?

  • What we need to understand is that objects in space

    我們要知道,太空中的物體

  • can cause people to think their days are numbered,

    會讓人覺得日子已屈指可數

  • even when there are events on Earth

    即使地球還有許多事

  • that can hurt or kill us

    在太空動手前

  • before something from space does.

    早就能讓我受傷或死亡

  • So, what are the odds that one of these objects

    所以,太空物體有多少機率

  • will really affect Earth

    會真的影響地球、

  • and you

    你、

  • and me

    我、

  • in our lifetime?

    在我們一生中?

  • Well, we can take what we know about the universe

    我們可以用對宇宙的了解

  • to try and figure that out.

    試著找出答案

  • You might have heard stories

    你也許聽過許多

  • about asteroids hitting the Earth.

    小行星撞擊地球的故事

  • That would be pretty bad.

    那一定很糟

  • Scientists think asteroids might have killed off

    科學家認為小行星可能造成了

  • most of the dinosaurs.

    大多數恐龍的滅絕

  • Sounds like something we should worry about, right?

    聽起來我們該要擔心,對吧?

  • Well, astronomers can now watch asteroids in space

    天文學家已能觀察太空中的小行星

  • and see them coming using complex computer models

    然後用複雜的電腦模型

  • to predict the deadly rock's path.

    預測致命岩石的路徑

  • For a while, the reported odds

    有一陣子,預測

  • that asteroid Apophis would strike Earth in 2036

    小行星阿波菲斯 (Apophis) 2036 年撞擊地球的機率

  • were once 1 in 625.

    是 1/625

  • But, after updating their data,

    但更新數據後

  • astronomers now say the chances are extremely low.

    天文學家現在認為,可能性極低

  • Okay, what about the sun?

    好吧,那太陽呢?

  • Hollywood movies like to pick on our sun

    好萊塢電影喜歡在太陽上作文章

  • by showing Earth destroyed by solar flares

    上演太陽閃焰毀滅地球

  • or the sun dying out,

    或是太陽燃燒殆盡

  • which would cause Earth to freeze.

    導致地球冰凍

  • Astronomers predict our sun contains enough gas

    天文學家預測太陽有足夠的燃料

  • to make energy for another 3 to 5 billion years.

    再提供三十到五十億年能量

  • So, in 3 to 5 billion years,

    所以,在三十到五十億年後

  • if people still exist on Earth,

    如果地球上還有人

  • they'll have to deal with that.

    他們就要面對這個問題

  • But today, well, we're safe.

    但目前我們很安全

  • Sometimes the sun does shoot flares at Earth,

    有時太陽的確會朝地球發出閃焰

  • but the magnetic fields surrounding our planet

    但環繞地球的磁場

  • blocks most of that radiation.

    擋住了大部份的輻射

  • The radiation that does get through

    真正通過的輻射

  • creates things like the Aurora Borealis.

    造成了極光之類的現象

  • Gigantic solar flares can mess with our satellites

    巨型的太陽閃焰會干擾人造衛星

  • and electrical equipment,

    還有電子儀器

  • but the chances of it killing you are pretty slim.

    但殺了你的機會微乎其微

  • Okay, what about that supermassive black hole

    好吧,超大質量黑洞不就在

  • in the middle of our galaxy?

    我們銀河系的中心嗎?

  • What happens to Earth,

    地球和我們

  • and us,

    會怎麼樣

  • when it pulls us in?

    如果被吸進去呢?

  • After all, it is supermassive.

    畢竟它是超級黑洞

  • Nope, not going to happen.

    不,這不會發生

  • That's one big object that can't bother us.

    這個大傢伙沒辦法影響我們

  • How can we be so sure?

    我們為什麼這麼確定?

  • Our solar system is on the edge of the Milky Way

    我們的太陽系,在銀河系的邊緣

  • while the nearest supermassive black hole

    而最接近的超大質量黑洞

  • is about 26,000 light years from Earth.

    離地球將近兩萬六千光年

  • That means we aren't on that black hole's menu.

    這表示我們不在黑洞的菜單上

  • So, you still think space objects are trying to kill you

    你還是認為太空想殺了你嗎,

  • even after what I've told you so far?

    即使我說了這麼多?

  • I think I've even convinced myself

    我覺得我幾乎已經說服自己

  • that odds are really good

    機率相當低

  • that space and the objects up there

    太空、還有太空中的物體

  • won't kill me after all.

    終究不會殺了我

  • But I'll probably keep looking up

    但我可能還是會持續看著天空

  • just to make sure nothing is headed my way.

    只是想確定沒有東西朝我飛來

There are still lots of things about space

關於太空有許多事情

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B1 中級 中文 TED-Ed 太空 地球 太陽 黑洞 銀河系

【TED-Ed】太空想殺了我們嗎? Is space trying to kill us? - Ron Shaneyfelt

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    VoiceTube 發佈於 2013 年 07 月 05 日
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