But the behavior of these lab-based cloud particles mimics the behavior of cloud particles in massive sky-sweeping clouds, only in miniature. “Of course, we don’t grow them at quite the same scale you ...

The fleeting glow of noctilucent clouds is once again making its appearance in Earth’s upper atmosphere, signaling the start ...

Space cloud' season is upon us. With a little luck, Brits might be able to spot spectacular noctilucent clouds in the evening ...

Bright blue-white noctilucent clouds danced over the town of Nykøbing Mors in Denmark just before dawn, just when this spectacular photo was taken. Night sky photographer Ruslan Merzlyakov ...

They look like brush strokes across the blue." In contrast to the Cirrus clouds, there's the Cumulonimbus storm cloud, "which reaches up maybe eight miles into the sky, spreads out at the top in ...

On Saturday, in Washington, November flung off the gray mask it wore on Friday and once more dazzled the city with the glories of late autumn, with blue ... many clouds shared the sky, they ...

clouds don't form as easily and haze doesn't clog our urban centers. The result is a crystal clear view of the azure expanse above. The warm hues of fall foliage naturally complement the blue sky.

We had a special treat Wednesday morning due to noctilucent clouds that are rarely seen in the Florida sky. Noctilucent clouds ... characteristic iridescent blue hue. This striking color arises ...

The blue moon is the second of two full moons in a single month. Each month usually ... full moon in a month — was coined by the magazine Sky & Telescope in 1946. Unlike some other celestial ...