In Pictures: 21 critical future NASA missions

NASA space plans include trips to Mars, Jupiter, Pluto and the Sun as well as climate change operations

NASA says a tiny satellite – under 300 pounds -- called Lunar Atmosphere and Dust Environment Explorer — (LADEE) could launch by 2013. Its goal would be to study the Moon's atmosphere and be linked to two mini-landers as nodes in an International Lunar Network (ILN) of 8 to 10 geophysical stations, NASA said. The ILN idea is still in development.

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