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 ...

Blue Ghost will spend the next 16 days in lunar orbit, if all goes to plan. It will conduct additional engine burns to circularize its path around Earth's nearest neighbor, then attempt a landing in ...

Venus, the Roman goddess of love and beauty, will gain "maximum brilliance" at night on Valentine's Day across Kentucky skies ...