The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

Low clouds may have spoiled the view from the ground, but a Falcon 9 set a new record early Saturday as SpaceX pushes ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Ever gazed up at the stars and felt that magical awe wash over you? As cities grow brighter, it's becoming harder to ...