ames research center

Space junk is a growing problem -- 200,000 pieces and counting -- and as the amount of earth's orbital debris increases, so does the chance some satellite will be involved in a cosmic collisi

For a while now, there has been a conversation going on in certain circles (you know, space circles): namely, if the most prohibitive part of a manned flight to Mars would be the return trip, why bother returning at all?

People have been trying to turn cellphones into medical and atmospheric scanners for some time now, but when it's NASA stepping up to th