The real space race is whether we will colonise off Earth on to other worlds before money for the space programme runs out.

真正的太空竞赛是我们是否会在太空计划的资金耗尽之前，在地球以外的其他星球建立殖民地。

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Scientists used the mothership of NASA's recycled Deep Impact comet probe to look at light reflected off Earth, the moon and Mars.

科学家们利用美国宇航局可回收的“深度撞击”彗星探测器的母船，来观测地球、月球和火星的反射光。

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Alternatively, it suggests life from Earth may have landed on other planets or moons on boulders blasted off Earth in an impact, though whether it could survive on those bodies is another matter.

另外，这还表明地球上的生命可能会经由撞击产生的碎屑降落到其他行星或者卫星，当然它们能否在这些天体上生存就是另一回事了。

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The short wave signals bounce off the ionosphere that surrounds the Earth,back to the ground and then back to the ionosphere.

VOA: special.2010.12.08

It's dangerous to want to get away from earth awhile, to get your feet entirely off the ground.

想要逃离地面一会，让自己的双脚同时离开地面很危险。

耶鲁公开课 - 现代诗歌课程节选

Worse still,after about 20 minutes after the ship takes off, all radio contact between ship and earth will be destroyed.

更坏的是，当飞船起飞20分钟后，所有飞船与地球的无线电通讯都被切断。

耶鲁公开课 - 死亡课程节选

It too will use the Atlas 5 to get off Earth.

BBC: Nasa announces space shuttle replacement shortlist

Andrew Cheng, project scientist for the Eros probe NEAR-Shoemaker, said the big question facing commercial space ventures remains what it will cost to get their equipment off Earth.

CNN: 'Fireflies' to scope out space rocks for mining

For example, instead of the lunar rendezvous method that NASA chose for the Apollo program, the player can opt for Earth-orbit rendezvous or even direct-ascent where a single giant spacecraft lifts off from Earth and lands on the Moon.

FORBES: The Return of "Buzz Aldrin's Race into Space" Game