Geminid meteor shower 2010 climaxes between midnight Monday and dawn Tuesday. But the spectacle also poses a question: Why is the asteroid that supplies the meteorites breaking apart?
Asteroid collision: The Hubble Space Telescope has spotted an odd X shape in our solar system's asteroid belt, in what could be the first image of an asteroid collision in space.
Astronomers have long suspected that objects in the main asteroid belt -- between Mars and Jupiter -- collide. Now they have what could be direct evidence.