The National Aeronautics and Space Administration’s EPOXI mission recently observed a cosmic snow storm originating from the comet Hartley 2. Consisting of both ice particles spewing from the ends of the comet and water vapor escaping from the middle of ...

The European Space Agency’s Rosetta spacecraft recently completed a flyby of the asteroid Lutetia, which allowed it to examine closely this celestial object, made mostly of metal. Thanks to NASA’s instruments, installed on the spacecraft, the high quality pictures could ...