The video was created with data from from the Clementine moon mission of 1990s, plus measurements from the Lunar Reconnaissance Orbiter, orbiting now.

Galaxy NGC 922 got its unusual shape millions of years ago when a smaller galaxy plunged right through its heart and shot out the other side.

Elliptical galaxies are among the largest single star systems in the universe and are built by the collisions of many smaller galaxies.

No one has sent us a photo of planets above pyramids yet, but we hope someone will! Meanwhile, enjoy our friends' photos of the December 3 planets, which were seen from around the world.

Who would have imagined we'd be able to watch the seasons change in the atmosphere of Saturn's large moon Titan? The Cassini spacecraft makes it possible.

In late November, with Jupiter a week away from being closest to Earth for 2012, full moon swept past Jupiter. Enjoy the photos from EarthSky Facebook friends.

The interstellar medium is the stuff between the stars. Made up mostly of hydrogen and helium gas, it contains all the material needed to make stars and planets. It is shaped by stellar winds, dying stars, galactic magnetic fields, and supernova explosions.

Two nearby planetary system have vast comet belts, but no Jupiter-like planets. Are those two things related?

Mars is a beaten and battered planet, according to a research team that recently finished counting and cataloging a staggering 635,000 Martian impact craters.

The sun produced a coronal mass ejection, or CME, today (November 20, 2012). See a NASA spacecraft photo of the CME as it leaves the sun.