Martian dust cascades

This image from NASA's Mars Reconnaissance Orbiter (MRO) shows streaks forming on slopes when dust cascades downhill.

Åhus tree

Stefan Nilsson 's annual winter image of this tree, on the beach in Åhus, Sweden.

Contrasting crescents

A comparative look at 2 crescent moons - Saturn’s icy moon Rhea and largest moon Titan - taken by the Cassini spacecraft.

Volcán de Fuego from Earth and space

Volcán de Fuego - literally "fire volcano" - is one of Central America’s most active volcanos. Photos of its recent eruption here.

Misty sunrise, happy dog

Misty and golden sunrise in England, with a man walking his very happy dog!

See it! Super Blue Moon eclipse photos

It was a Blue Moon, a supermoon and a moon in total eclipse. EarthSky community members around the world came through as always with awesome photos.

Double moon halo

A 22-degree lunar halo, with a 9-degree lunar halo inside it.

These clouds are called ship tracks

Ship tracks typically form among low-lying stratus and cumulus clouds. They form around exhaust particles released by ships.

ISS over Idaho’s Wood River Valley

On a cold January night, Nils Ribi captured the path of the International Space Station (ISS) in the southern sky over the Wood River Valley of Idaho.

Cartwheel Galaxy

Hubble Space Telescope image of a rare ring galaxy in the direction of the constellation Sculptor.