Mars moon Phobos in front of sun on August 8

The Curiosity rover on the floor of the Gale Crater caught this image of Mars' larger moon Phobos passing in front of the sun on August 8, 2014.

Anticrepuscular rays in a Texas sky

Next time you see crepuscular rays extending from a sunset … turn around. Look opposite the the sun. You might catch a glimpse of elusive anticrepuscular rays.

Favorite photos of September 12 aurora

Two powerful storms on the sun this week resulted in beautiful displays of the aurora borealis, or northern lights, that dipped down as far as the northern U.S.

Harvest Moon trilogy

This past full moon was the Northern Hemisphere's Harvest Moon, known for appearing entirely or nearly full for several nights in a row.

Home is behind, the world ahead

A mesmerizing view down a long, straight stretch of road, with a wild sky above.

Milky Way and moonset

Reflections of the moon and the Milky way in a pond atop Independence Pass in Colorado's Rocky Mountains

Campfire under Milky Way at Mount Bromo

Astrophotographer Justin Ng has just returned from Mount Bromo. Here's what a night on an active volcano in Indonesia looks like.

ISS crosses the moon’s face

A composite of 1/2-second of time when two objects in space converged. ISS is at 300 kilometers and the moon is at 384,000 kilometers away.

Filipino sunset

The Republic of the Philippines in Southeast Asia - in the western Pacific Ocean - consists of 7,107 islands.

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.