Looking for the most spectacular night skies in the U.S.? From national parks to remote deserts, discover the best places to ...

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

Curiosity rover images show iridescent clouds on Mars, helping scientists explore atmospheric and climate dynamics.

Patsy Cockerham is sharing these linear looking clouds captured on Thursday, Feb. 13 after a dredful week of cold rain and ...