The definitive moon atlas, revised, updated and improved with expanded text and maps.

最权威的月球地图集，修改版，更新和扩充了更多的文字和地图。

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One alternative to Ares, proposed by the United Launch Alliance, a joint venture of Lockheed Martin and Boeing, is to use modified versions of their existing Delta 4 and Atlas 5 rockets both to go to the moon and to resupply the space station, but at lower cost.

ECONOMIST: Human spaceflight