Sprites “are transient luminous events” that “are triggered by intense electrical activity in the thunderstorms,” astronaut ...

A “roll cloud” spotted off the coast of Portugal looked like something out of a movie. Here’s the science behind it.

Microsoft acquired the rights to Bliss in 2000, and from the company's widespread use of the photo as the official Windows XP wallpaper, it's speculated to be the most viewed photograph in history.

Puffy, wispy, white and gray, we’ve seen them all this spring. Clouds come in a variety of types, and each type comes with ...

The Moon’s illumination is given at 12 P.M. local time from the same location. For a look ahead at more upcoming sky events, check out our full Sky This Week column.

After all, the sky's the limit. “The Fornasetti clouds wallpaper was used to add some whimsy to a home that was more New England traditional in its aesthetic,” she says.

Back to Article List Deep-Sky Dreams: The Cepheus Molecular Cloud In this new series, Astronomy Editor Dave Eicher will be highlighting a different deep-sky object every day.

If density is considered 0.5 grams of cloud droplets within that given volume, the mass is 500,000 kilograms (1.1 million pounds or 551 tons). I arrived at that number by doing a simple math problem.

For millions who used computers in the early 2000s, a single image remains etched in memory – a serene landscape of rolling green hills beneath a brilliant blue sky, dotted with fluffy white clouds.

These cloud formations aren’t terribly mysterious, despite their nearly perfect orientation across the sky. Cloud streets are simply long rows of cumulus clouds that develop parallel to the ...