But such transits have paved the way for what might prove to be one of the most vital breakthroughs in the cosmos—detecting Earth-sized planets orbiting other stars.

但是这样的凌日现象已经为被证明可能是宇宙中最重要的突破之一的说法铺平了道路，这个说法即找到那些围绕其他恒星轨道公转的和地球大小相似的行星。

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All the gravity of all the mass in the cosmos should have been pulling the universe back inward, just as gravity pulls a ball back down to Earth after it's been thrown into the air.

宇宙中每一物体的每个引力都会对宇宙产生一个指向物体本身的拉力，就像在重力作用下，抛向空中的球会被拉回地面。

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In his book Cosmos, the late scientist Carl Sagan talks about the way in which the earth is regularly struck by material from outer space.

已故科学家卡尔·萨根在著作《宇宙》中叙述了外太空物体如何有规律和地球发生碰撞。

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He conducted the first radio search for extraterrestrial intelligence and helped construct the Voyager interstellar record, which carried pictures and music from Earth out into the cosmos.

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The images from the Hubble, which has a clear view of the cosmos from its orbit above the Earth's turbulent atmosphere, will enable astronomers to gain a better understanding of black holes and the effect they have on material captured in their gravitational trap.

BBC: Hubble spies black hole gobbling galaxy

In Galactica, there were the 12 colonies of Kobolin that quase-biblical space epic that ultimately asked whether Earth had close relatives elsewhere in the cosmos.

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