Near-Earth orbit is packed with satellites, essential to communication and navigation back on Earth. But many of those satellites are aging, so what happens when they break down, or need refueling?
Simply ditching the satellites would be wasteful -- it costs many millions of dollars to build and launch a satellite -- and then there's the fact that it's getting pretty crowded up there.
Read More: http://news.discovery.com/space/nasa-welcomes-our-surgical-robot-overlords-120127.html
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