Sentences with phrase «space exploration programs back»
The Mars rover has turned into a political pawn in heated discussions over proposed funding cuts to NASA that critics say will set deep - space exploration programs back significantly.
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But the unmanned space exploration program has done far, far more to push forward scientific knowledge than those missions that include astronauts, which mostly have been limited to earth orbit, other than a few jaunts to the moon that brought back a few rocks, so valuable to science that some have ended up as souvenirs.