When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in circular orbits around the Sun on a flat disk. But in reality, our Solar ...

The so-called 'planetesimal belts' are filled with tiny millimeter-sized particles created by collisions between comets.

A near-Earth object was likely ejected into space after an impact thousands of years ago. Now it could contribute new ...