Free of the confounding effects of the Earth s own atmosphere, it will be able to isolateimages of alien planets, make spectra of the light from their air, and examine those spectrafor the characteristic dark lines that are caused by part of the light being absorbed byparticular gasesoxygen among them.
脱离了地球大气层的混淆效应,望远镜将能够分离外星生物的图像,在他们的大气中制作出来光谱,并且为这些有特点的暗线检查光谱。这些暗线部分是由特殊气体大气中的氧气所吸收的光产生的。
Plate tectonics
行星构造地质学
Space telescopes are nothing new, of course, and several more are in the works.
当然,太空望远镜并不是什么新事物,并且已经有几个已经在使用中了。
But existing plans to photograph extrasolar planets in this way involve orbiting arrays ofreflecting telescopes all pointing in exactly the same direction.
但是在现在的计划中,利用这种方法给太阳系以外的行星拍照就需要让多组的反射望远镜在轨道运行的时候全部精准的朝向同一个方向。
An array is needed because a single mirror big enough to do the job of separating star fromplanet would be too large to launch.
由于一个体积足够大到能够将恒星与行星分开的单一镜面将会由于体积太庞大而无法发射,因此一组反射望远镜就是必须的。
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