Twin orbs of superhot plasma at the Milky Way's center known as the "Fermi bubbles" contain inexplicable clouds of cold ...

This special “smiling rainbow” only appears in the sky when the sun is around 22 degrees above the horizon. The sun may be ...

NASA Odyssey orbiter snapped a first-ever image of a Mars volcano peeking above clouds before dawn. It’s twice as tall as Earth’s largest volcano.

NASA’s venerable 2001 Mars Odyssey orbiter has delivered a stunning new panorama of the Red Planet, revealing the colossal Arsia Mons volcano majestically peeking above a canopy of morning clouds.

One of Mars' tallest volcanoes peeps over a thick layer of clouds, in Odyssey’s first picture of Arsia Mons peering over the Red Planet's horizon.

From their observations, Lin and colleagues noted consistent changes in the properties of cirrus clouds following three volcanic eruptions. Where ash-rich eruptions occurred, the researchers noted ...

It marks the first time Arsia Mons has been imaged on the planet's horizon, NASA said.

A new panorama from NASA's 2001 Mars Odyssey orbiter shows one of the red planet's biggest volcanoes, Arsia Mons, poking through a canopy of clouds just before dawn.

But you'll need a little luck. Noctilucent cloud season is upon us! Here's what you need to know about when to catch the spectral phenomenon as we move into the prime viewing season of the summer ...

A stunning cloud iridescence created a bright silhouette above the mountains in the Philippines. Footage shows the optical illusion shimmering in the sky in Davao del Sur. Pastel blue, reddish ...

A stunning cloud iridescence created a bright silhouette above the mountains in the Philippines. Footage shows the optical illusion shimmering in the sky in Davao del Sur. Pastel blue, reddish ...

Noctilucent or “night-shining” clouds are rare phenomena that occur about 80 km above sea level (not far from the Karman line that separates Earth from space, at 100 km).