glowing blue spiral in the sky. Images and videos posted to social media showed the strange cloud-like phenomenon, with users wondering what caused the intriguing sight. The UK Met Office, ...

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

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 ...

Ice crystals reflect the sunlight and appear as electric blue wisps in the night sky, reaching out toward the edge of space. Earlier this year, a Minnesota woman captured a cloud formation that ...