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

Scientists have unlocked the 3D structure of molecular clouds in the Milky Way’s center, using a groundbreaking X-ray technique. These cosmic clouds, vital for star formation, were illuminated by past ...

The rest of Wednesday will shape up dry and mostly cloudy. A closer storm will pass through Thursday. In fact, snow will develop around midnight Wednesday night and fall for a few hours before mixing ...