How the Universe Works: A Unique Beginning
Our moon was created accidentally when another planet collided with Earth.
Most Watched in The Solar System
Sci-Trek: Moon Prospecting
NASA plans to go to the moon in search for energy rich regolith. Watch this video from Discovery Channel's "Sci-Trek" to learn more.
Recent Videos in The Solar System
Space: Hubble Captures Saturn's Aurorae
NASA and ESA astronomers released movies of Saturn's northern and southern lights, glimpsed edge-on for the first time by the Hubble Space Telescope. Jorge Ribas reports.