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

Satellite images show moment volcano spewed ash more than four miles into sky - Images shared by the European Space Agency ...

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 ...

This month's night sky is filled with close-range meteors, swirling nebulas, and prime stargazing conditions. Here’s when you should be looking up. The Milky Way and its core region in ...

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 ...

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 ...

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.

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 ...

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 ...

The month of June offers an exciting opportunity to see rare 'space clouds' in the evening sky. Called noctilucent clouds, these weird clouds glow in the hour after sunset and are only visible for ...