While most clouds form in the troposphere between Earth’s surface and about 11 miles above the ground, these appear in the mesosphere, up to 50 miles high.

Around this time, the sun never dips far below the horizon, leaving it well placed to illuminate the high-altitude icy particles as night settles in. Noctilucent clouds most commonly appear ...

India’s high-altitude temples, scattered across the Himalayas and other mountain ranges, are architectural marvels and spiritual havens. Perched at dizzying heights, these sacred sites draw ...

More information: Maki Nagata et al, High-velocity Molecular Clouds in M83, The Astrophysical Journal (2025). DOI: 10.3847/1538-4357/addab7 Journal information: Astrophysical Journal ...

Ingenuity: NASA's remarkable Martian helicopter A dazzling image taken by NASA's 2001 Mars Odyssey orbiter shows an unprecedented view of a 12-mile-high volcano poking through clouds at dawn on ...

NASA Wants Your Help to Study These Rare, High-Altitude Clouds That Appear to Glow at Sunrise and Sunset Noctilucent clouds usually form close to the poles, but in recent decades, they’re being ...