This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments that appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive a neutron star as massive as the Sun but with only the size of a small town.

Planetary conjunctions are beautiful to photograph from Earth, but send a camera to another planet in the Solar System, and you can shoot a planetary conju

Emission nebula found in the constellation Sagittarius

From east to west the stars comprising the belt are: Mintaka, Alnilam and Alnitak.

The best meteor shower of the year is upon us right now. If you go outside to a dark enough place, far from the city lights, you may spot tons of shoo...

Open cluster in the constellation Scorpius

A planetary nebula; not edible

Sometimes described as an open cluster but more likely an asterism, the Coathanger was first described in 964 AD and is found in the constellation Vulpecula.

Scott Kelly caught the moon, Earth, Venus, and Jupiter in a row from his perch on the International Space Station.

Last month, NASA shared the first full photo of Earth captured with its new DSCOVR camera that's floating 1 million miles away. R camera that’s floating 1 million miles away. Today it released another amazing series of shots, with this one showing the moon floating across the face of the Earth. The 20-second video above strings a number of the pictures together.

This glowing space bubble looks like something from Star Trek, but it's actually a planetary nebula captured by the Very Large Telescope.

An open cluster near the tail of the constellation Scorpius

Astronomy Picture of the Day, November 18, 2012

Astronomy Picture of the Day, October 2, 2014

Globular cluster in the constellation Serpens

Snow, aurora, Milky Way, aurora, snow

NASA’s New Horizons has sent back a trove of new data about the dwarf planet - from ice plains to atmospheric haze.

December 22, 2013

Backlit by the sun, Pluto’s atmosphere rings its silhouette like a luminous halo in this image taken by NASA’s New Horizons spacecraft around midnight EDT on July 15.

(July 24th New) Backlit by the sun, Pluto’s atmosphere rings its silhouette like a luminous halo in this image taken by NASA’s New Horizons spacecraft.