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Cosmic Train Wreck: Galactic Collision

Related Article: Learn more about the Milky Way.

Scientists study the possibly of the Milky Way colliding with the Andromeda galaxy.
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Shape of the Universe

Shape of the Universe (2:34)

Learn about the forms and contours of the universe.

Discover Magazine: Pluto's Status

Discover Magazine: Pluto's Status (2:21)

On Discovery Channel's "Discover Magazine," scientists debate whether Pluto is a planet or not.

Distance and Time: The Center of the Galaxy

Distance and Time: The Center of the Galaxy (0:41)

30,000 light-years away lies the center of our own galaxy: the Milky Way. The Milky Way is part of a group of galaxies that in turn is part of a supercluster galaxy.

100 Greatest Discoveries: The Planets Move

100 Greatest Discoveries: The Planets Move (2:25)

One of the first great discoveries was when scientists disproved the theory that the planets revolved around the Earth. Learn more about the movement of the planets on The Science Channel's "100 Greatest Discoveries."

100 Greatest Discoveries: Halley's Comet

100 Greatest Discoveries: Halley's Comet (1:58)

On The Science Channel's "100 Greatest Discoveries," learn all about the discovery of Halley's Comet.

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10 Ways to See into the Future: The Big Crunch

10 Ways to See into the Future: The Big Crunch (2:53)

Ever wonder if you can go backwards in time and start over? According to the Big Crunch Theory, you can repeat history-- in a couple billion years. Learn more on The Science Channel's "10 Ways to See Into the Future."

What the Ancients Knew: Jantar Mantar

What the Ancients Knew: Jantar Mantar (1:22)

See how the Indians used astrological instruments to track the stars. Learn more in The Science Channel's series, "What the Ancients Knew."

The Year in Space 2000: The Hubble Telescope

The Year in Space 2000: The Hubble Telescope (2:54)

On The Science Channel's "Year in Space 2000," the Hubble Telescope, a 3 billion dollar satellite, has faced numerous problems since its deployment. Luckily NASA was able to send missions to fix the satellite.

100 Greatest Discoveries: Chicxulub Crater

100 Greatest Discoveries: Chicxulub Crater (1:47)

Chicxulub crater is a massive hole located at the bottom of Gulf of Mexico. Learning about the asteroid that created this crater could explain what caused the extinction of the dinosaurs. Learn more on The Science Channel's "100 Greatest... More »

100 Greatest Discoveries: The Planets Move

100 Greatest Discoveries: The Planets Move (2:25)

One of the first great discoveries was when scientists disproved the theory that the planets revolved around the Earth. Learn more about the movement of the planets on The Science Channel's "100 Greatest Discoveries."

100 Greatest Discoveries: Halley's Comet

100 Greatest Discoveries: Halley's Comet (1:58)

On The Science Channel's "100 Greatest Discoveries," learn all about the discovery of Halley's Comet.

100 Greatest Discoveries: A Disk of Stars

100 Greatest Discoveries: A Disk of Stars (2:47)

Musician, astronomer and telescope maker, William Herschel discovered the planet Uranus and that the Milky Way is full of stars. Learn more about his findings on The Science Channel's "100 Greatest Discoveries."

The Comet's Tale: Earth Impact

The Comet's Tale: Earth Impact (1:50)

In this clip from The Science Channel's "The Comet's Tale," an airburst is explained. Scientific evidence from 1908 suggests that these catastrophic disasters come from a comet hitting the earth. Learn more with this clip.

100 Greatest Discoveries: K-T Boundary Discovery

100 Greatest Discoveries: K-T Boundary Discovery (2:44)

A researcher discovered a clay layer that marked the boundary between two different geological periods. Named the K-T boundary, it was created by a miles long meteor. Learn more with the Science Channel's series, "100 Greatest Discoveries."

Exploring Time: Universe Expansion Acceleration

Exploring Time: Universe Expansion Acceleration (3:00)

On the Science Channel's "Exploring Time," learn how studying supernovas reveals that the universe's expansion is accelerating.