Curiosity, a set of NASA 's robotic "eyes" on the Red Planet, recorded 16 minutes of so-called noctilucent clouds flying ...

However, when the stratosphere reaches these lower temperatures, widely spaced water molecules coalesce into tiny ice crystals, forming rainbow clouds. PSCs form over some hilly mountains.

The clouds, composed of carbon dioxide ice crystals, glow in shades of red, green, and pearlescent hues in the martian ...

A rover got a new view of some peculiar extraterrestrial clouds, flecked in rainbow colors and moving ... Researchers learned that the clouds form when ice crystals condense on meteor smoke ...

Bright and dazzling, waves radiating rainbow colors sweep across the northern skies of Sweden, displaying beautiful hues. Known as "nacreous clouds" or "mother-of-pearl clouds," these clouds are a ...