As well as their environmental importance, clouds have great aesthetic value, turning the sky into an art gallery. I’m not alone in my admiration.

SEATTLE — Seattle Art Museum's newest commission has visitors cloud gazing inside their lobby. The large-scale installation ...

NASA will once again attempt a rocket launch Thursday morning that could make blue-green and red clouds visible from New York to North Carolina.

Hey, hey, you, you, check out my Mars clouds. NASA's Curiosity rover might be obsessed with rocks and geology at ground level, but it also takes time to see what's happening in the Martian sky.