The Caib probe concluded astronauts would still be unable to fix such damage once in orbit.

哥伦比亚事故调查委员会经过周密调查后得出结论：万一航天飞机在轨道运行中发生类似的损坏，宇航员仍旧无法展开修复工作。

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Once in orbit two of the themis spacecraft will circle earth about one-sixth the distance to the moon while the other two circle half way to the moon.

一旦进入轨道，西弥斯太空船将会在只有地月距离的六分之一的高度处绕地球运转，同时，其他两颗在地月距离一半处绕行。

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Rockets are tall, but not particularly wide.With inflatable spacecraft, the structure can be packed tightly into the payload and then filled with air once in orbit.

运载火箭虽然很高，但不是特别宽，如果使用充气式航天器，就可以事先折叠起来，塞进火箭里，待入轨后再充气展开。

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What makes it Vulcanlike, though, is that it circles its star, Kepler-10, once every 20 hours, in an orbit a twentieth the size of Mercury's.

ECONOMIST: Time to start giving extrasolar planets proper names

Once the two GRAIL satellites are in orbit, their next step is to begin a five week phase in which they increase the speed at which they orbit the Moon.

FORBES: NASA's GRAIL Mission Will Unlock Secrets Of The Moon's Interior

Once again, these worlds were identified using data from Nasa's Kepler telescope, which was put in orbit in 2009 with the specific goal of hunting down small planets.

BBC: Newly found planets are 'roasted remains'