The asteroid sample return spacecraft Hayabusa, hit by a series of hard luck over the years, has restarted its ion engines, and is headed back to Earth carrying a bit of an asteroid (probably). Learn more about this Japanese mission that has suffered a leaky rocket system and other disappointments, but which just might have managed to gather a little asteroid dust in its sample collector. Scientists hope to find out for sure if and when the craft makes it back to Earth for its scheduled landing in 2010.