Aurora chaser and photographer Harlan Thomas ( @TheAuroraGuy) was about 18.5 miles (30 kilometers) north of Calgary along a ...

But the clouds in the image formed in the mesosphere ... Ice crystals reflect the sunlight and appear as electric blue wisps in the night sky, reaching out toward the edge of space.

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 ...

JACKSONVILLE, Fla. — Early risers across Northeast Florida were treated to an interesting sight Wednesday morning: wispy, glowing clouds in the eastern sky just before sunrise. These are known as ...

Puffy cumulus and drab stratus are mainstays in the scenery of our everyday life, but there are some extraordinary clouds ...

Noctilucent cloud season is upon us! Here's what you need to know about when to catch the spectral phenomenon as we move into the prime viewing season of the summer months. Astronomers and clouds are ...

the sky eventually gives way to deep blue while the mountain-life clouds hang on the horizon, the extraordinary pictures show.

There are the puffy cotton ball-like clouds against the blue sky — those iconic cumulus clouds ... I started to realize that the images I was capturing were really pictures of the clouds ...

There are 10 main types of clouds. There's the Cumulus cloud, otherwise know as the Simpsons' cloud. "The cartoon cloud that forms on a sunny day. The fair weather cloud. It's like the generic one, ...

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 ...