Send your thoughts and images to asteroid Bennu

Submit your message on the future of communications or solar system exploration. It might be chosen for a time capsule aboard an asteroid sample return mission.

Lifeform of the week: Hoatzin

Physiologically and evolutionarily, the hoatzin is a fascinating bird. Just hold your nose when you're near it.

Milky Way over Arecibo Observatory in Puerto Rico

Arecibo Observatory's 1,000-foot (305-meter) radio telescope is the world's largest single-aperture telescope.

U.S. Southwest may face mega-drought this century

With ongoing climate change, the long view of future drought risk in the U.S. Southwest is not a pretty picture, say scientists.

What if you could see the sound of a nightingale?

Australian multimedia artist Andy Thomas creates 3D animations of bird songs. He calls them “audio life forms.”

At Iceland volcano, a white plume rises from the lava fountains

Observers around the world are watching the Bárðarbunga volcano in Iceland. Read about four likely scenarios for what might happen next.

The first known example of Neanderthal rock art

Tool marks within the engraving suggest that it was likely created by someone who intentionally passed a sharp object again and again over the cave wall.

Andromeda Galaxy

Beautiful shot of M31 - closest large spiral galaxy to our Milky Way - by our friend Tom Wildoner.

Fav photos of August 31 moon, Saturn and Mars

Did you see the moon near the planets Saturn and Mars Sunday evening? Thanks to all EarthSky friends who captured and shared these beautiful images.

What is the blue hour?

The blue hour - when the sun is some distance below the horizon, when the sky is deep blue and the landscape is suffused with bluish light - is a good time to take photos.