Stargazers in parts of Europe were stunned by an unusual sight on Monday evening: a large, glowing blue spiral in the sky.

Have you ever wondered how clouds stay in the sky? Here's your answer, and by the way, the weight of an actual cloud might ...

A stunning blue and white spiral spotted in skies across Europe late Monday was created by frozen fuel tumbling from a SpaceX ...

But some cycles are visible — at least in part. On a warm, blue-sky day, I found myself gazing up at condensing water in the sky in the shape of white, puffy clouds. Even among the most ...

The shape is thought to be the result of leftover fuel released into space as the Falcon 9 rocket returned to Earth.

This GOES-W repeating satellite time-lapse video provided by the National Weather Service in Portland, captured between 8 a.m ...

Sunday turns much colder, with highs in the low to mid-30s. After a few morning clouds, nearly total blue sky is expected in ...

Rainfall triggers bursts of natural nanoparticles, which contribute to cloud formation and additional precipitation over the ...

TAKAHASHI, Okayama Prefecture--A university lab is providing artificial intelligence-based probabilities on whether a sea of clouds will form around the “mountain castle in the sky” here.