For Mars, NASA wants to orbit a small asteroid around the moon

March 26, 2015 1:56 PM

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For Mars, NASA wants to orbit a small asteroid around the moon

Sen—NASA says it will learn more about what it takes to send astronauts to Mars by practicing with a piece of an asteroid relocated into lunar orbit rather than by snaring and transporting an entire small body.

After detailed studies of both options, NASA on Wednesday unveiled its preference for Plan B -- plucking a 2- to 4-meter diameter boulder off the surface of a larger asteroid and nudging it into a high lunar orbit. Despite a price tag of roughly $100 million more than Plan A, NASA associate administ...

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