Space is a mess -- and getting messier. Remember the 2013 movie "Gravity"? Sandra Bullock plays an astronaut stranded in space after her ship is hit by flying remnants of a wrecked Russian satellite.
Fictional, yes. But the movie touches on a very realistic possibility. Tons of trash -- also known as "orbital debris" -- are floating in space, thanks to wrecked satellites, detached rocket engines and spacecraft that has gone incommunicado.