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为什么要把望远镜放到太空里? – 译学馆
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为什么要把望远镜放到太空里?

Why Do We Put Telescopes in Space?

如果一个望远镜的用途是让遥远的事物更接近我们
If the purpose of a telescope is to bring far-away things closer to us,
那么为什么我们把它们送到那么远?
then why do we send some of them so far away?
把望远镜送入太空的主要原因是要避开一个永远的麻烦制造者:
The main reason to put a telescope into space is to avoid that perpetual troublemaker:
大气
the atmosphere
因为天文学家还没有想出如何摆脱它
since astronomers haven’t yet figured out how to get rid of it.
所以它是一个大麻烦。
And it’s a big nuisance.
首先,大气层阻碍信号传播。
First off, the atmosphere plane gets in the way,
它的云、烟和霾等会阻碍来自遥远星球或临近行星的光线。
what with its clouds and smoke and haze than can block light from distant stars or nearby planets.
甚至晴朗天空中的空气也会阻碍很大波长范围的光,
And even just the air in a clear sky blocks a huge range of the wavelengths of light,
大气几乎只允许通过可见光、少数红外和射电电波。
pretty much only letting through visible light, and a smattering of infra-red and radio waves.
大气还
The atmosphere is also-
-嘿!停下来!
-HEY! Stop that!-
别分散注意力
…Distracting
白天,来自太阳的可见光被空气分子和其他小颗粒反射
At day, visible light from the sun bounces off of air molecules, and other small particles
完全淹没了你可能想看到的来自其他星球的光。
and completely overwhelms the light from any other star you might want to look at.
在晚上,来自月亮和人造光源的光线反射了同样的小颗粒
At night, the light from the moon and from human sources bounces off the same paricles
也比遥远又微弱的星光和银河系明亮得多。
and outshines the light from most distant and faint stars and galaxies,
洗掉了它们的图像
washing out their images.
大气层当然也把事情变得复杂了
The atmosphere AlsO MeSSEs ThINGs up.
空气分子持续地运动,就像是海市蜃楼一样,它们的剧烈运动让星光变得模糊而扭曲
Air is constantly moving, and just like a heat mirage, this turbulence blurs and distorts starlight,
这就造成了星星闪烁,也使望远镜所得图像模糊
which causes stars to twinkle, and telescope images of stars to be blurry
我们可以把望远镜放到大气层之上,放在太空中,来避免上述所有麻烦
We can avoid all of these nuisances by putting telescopes above the atmosphere, in space.
另外,还有一些其他的益处
Plus, there are other benefits;
空间望远镜可以24小时进行观察
A space telescope can make observations 24 hours a day,
空间望远镜可以被放得足够远,免受地球的红外温度影响
A space telescope can be put far enough away from the earth’s infra-red warmth
从而拥有到足够低的温度,能拍摄到清晰的红外照片
and then cooled down really cold so that it can take clean infra-red images,
还有,我们竟然可以把太空望远镜放到外太空!
and a space telescope is a telescope we freaking put in outer space!
当然,空间望远镜也有一些缺点
Of course, there are some downsides to space telescopes;
让望远镜抵达外太空既困难又昂贵
It’s hard and expensive to get them there,
对其进行维修或升级也是困难而昂贵
hard and expensive to fix them if they break or you want to upgrade to newer fancier parts,
将人送到那还是困难而昂贵
hard and expensive to take people there on tours,
不过,说真的,看看这张图,你还想说什么
but really, How can you argue, with *this*
还有,这张
And this
还有这张
And, this
还有这张
And this
还有这张
And this
还有这张
And this
当然还有这张
And even this
这张
And this
这张
And, this
这张也是
This too.
还有这张
And this.
感谢您的收看,
Thank you so much for watching,
这个短片受James Webb的空间望远镜项目支持
This video was supported by the James Webb space telescope project
在空间望远镜科学实验机构
at the space telescope science institute
他们在这把望远镜送到太空,都不用担心云雾和降雨
where they put telescopes into space so you don’t have to deal with stuff like clouds, and rain.
再次感谢您的收看,
Thanks again for watching,
并且再次感谢James Webb空间望远镜项目对本节目的支持。
and thank you again to the James Webb space telescope project for supporting this video

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https://www.youtube.com/watch?v=Ij-u2bHo_fw

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