For us common people on the earth, the dream of travelling around space will come true.

对于我们这些地球上的普通人，去太空旅行的梦想会成真。

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My dream is to go into space by spacecraft.

我的梦想是乘坐宇宙飞船去太空。

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On the flip side, companies like Virgin Galactic are plotting a bottom-up assault on the space dream by making it a reality to the public.

另一方面，维珍银河等公司正在策划对太空梦发动一场自下而上的袭击，让普通大众也能够实现自己的太空邀游梦想。

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In 2010, when Mr Obama outlined his ideas, he spoke, somewhat vaguely, of a manned trip to a near-Earth asteroid, to be followed at some unspecified date in the 2030s by the ultimate space-cadet dream a manned mission to Mars.

ECONOMIST: The space shuttle

And, for those space-cadets who still dream of a manned mission to the planet, there is also the Mars radiation environment experiment.

ECONOMIST: Mars Odyssey

The heroes of Mr Morton's book are the astronomers who yearn to solve Mars's scientific puzzles, the science-fiction writers who project their politics on to Mars's blank canvas, and the space-flight enthusiasts who dream of Martian colonies.

ECONOMIST: Mars