The lava flows and ash clouds were probably caused by the collapse of a flank of Etna’s southeast crater, authorities said, ...

Puffy cumulus and drab stratus are mainstays in the scenery of our everyday life, but there are some extraordinary clouds that lurk above our heads on a regular basis. Clouds play a starring role ...

WRAL viewers submitted photos of beautiful clouds they saw in the sky before Wednesday night's storms. WRAL meteorologist Elizabeth Gardner said they're actually quite common. "It's a beautiful ...

This dense star field appears as a big, fuzzy patch in the night sky from anywhere in the Southern Hemisphere ... of wispy gas that resembles multicolored cotton candy against a background of orange ...

The universe is huge, yet astronomers have looked at a few parts of the night sky over and over again ... beyond—have looked at the Magellanic Clouds, two mini-galaxies in our celestial ...

There are some sources of background light even then ... from the more distant stars, keeping the sky dark. Sadly, this doesn’t work. Those clouds heat up from absorbing all that radiation ...

This process creates the classic shelf cloud—broad, arching, and often layered like a stack of waves in the sky. One of the reasons shelf clouds are so visually stunning is because of wind shear ...

In the sunshine, it seemed even warmer, and although many clouds shared the sky, they did not seem to ... leaves bore autumn’s banner against a background of black branches and blue skies.

ST. PETERSBURG, Fla. — We had a special treat Wednesday morning due to noctilucent clouds that are rarely seen in the Florida sky. Noctilucent clouds are a part of a celestial phenomena usually ...