Assignment Discovery: Orpheus Impact and Moon Formation
On Discovery Channel's "Assignment Discovery," Dr. Robin Canup discusses her models for possible moon formations.
Most Watched in Astronomy
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.
Assignment Discovery: Black Hole Formation
Theories suggest that when a neutron star is more than three times as heavy as our sun even the neutrons cannot resist gravity, imploding into a black hole. Learn more on Discovery Channel's "Assignment Discovery."
Assignment Discovery: Event Horizon
The event horizon is not made of matter, and is, in a sense, just a location where gravity becomes so strong nothing can escape. Learn more about event horizon on Discovery Channel's "Assignment Discovery."
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."
Cosmic Collisions: Neutron Star Threat
The collision of binary neutron stars produces one of the most violent explosions in the universe and a deadly gamma ray blast that could devastate Earth.
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."
Asteroids vs. Meteorites
Think you know the difference between an asteroid and a meteorite? Watch this video to see if you do.
Recent Videos in Astronomy
Bad Universe: Imminent Danger
Earth is hit with football-size space objects every hundred years, but there's strong evidence that an extinction-level objects have impacted with us before.
Bad Universe: Doomsday
To replicate what it would be like for a huge asteroid to hit Earth, Phil detonates a to-scale bomb and investigates the results.
Space: Mystery Surrounds Solar Flare Event
Are mysterious particles shooting through Earth during solar flare events? Enough to disrupt the decay rate of radioactive material previously assumed to be constant? Discovery News' Ian O'Neill explains why scientists think that may be the case.
Through the Wormhole: The Balance of Forces
The universe as we know it is possible due to an extremely precise balance of forces. A formula so exact, that one small change would disallow any form of life. Did a divine hand make certain the balance was just right?