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

Cloud watchers have recently been given record-breaking glimpses of the rarest clouds in the skies. Stunning rippled blue clouds have ... the rarest clouds in the sky.

While astronomy and clouds don’t usually mix, a rare type of atmospheric phenomenon, called noctilucent or night-shining ...

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 ...

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 ...

If you’ve noticed some strange blue clouds in the night sky recently, you’re not alone. Uncharacteristically blue nighttime clouds, usually seen over polar regions, have been visible as far ...

The color of this blue naturally appears the more striking when seen in immediate contact with the clouds. Probably our very familiarity with the every-day appearance of the sky diminishes our ...

Since that retreat, the economy has melted, leaving us surrounded by gray clouds.It's easy to forget the blue sky. We can't see it right now, but it's still there. Today is as good a day as any to ...

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 ...

The image is a combination of twelve separate pictures taken through red, green and blue filters ... on the sky to the larger constellation of Sagittarius and the rich star clouds towards the ...