How the Universe Works: A Unique Beginning
Our moon was created accidentally when another planet collided with Earth.
Most Watched in The Solar System
Ask An Astronomer: Falling Moon
Watch this NASA "Ask an Astronomer" video to see why the moon doesn't smash into the Earth. Since the moon is so far away from Earth and is moving so fast, it's actually always falling. It just never hits the earth and stays in a continuous orbit.
Space School: Mercury
The closest planet to the sun, Mercury boasts both boiling hot and freezing cold temperatures. Learn more about this mercurial planet in the following clip from the Science Channel's "Space School."
Solar Empire: Introduction to Venus
On TLC's "Solar Empire," Venus has a rocky surface that is scarred from ancient lava flows. Carbon dioxide gets trapped in Venus' atmosphere creating a greenhouse effect that warms the planet to 300 degrees Fahrenheit.
Space School: The Milky Way
Despite being one of billions of galaxies in the universe, the Milky Way is special. Find out why in this video from the Science Channel's "Space School."
Space School: Saturn
Saturn may be famous for its rings, but this gas giant also happens to possess the most powerful winds in our solar system. Learn more about Saturn in this segment from the Science Channel's "Space School."
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.