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The Week of the Comet: Shoemaker-Levy

Related Article: Learn more about comets.

Heat-sensitive imaging shows the damage caused to Jupiter by the Shoemaker-Levy comet.
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Could a Black Hole Destroy the Earth?

Could a Black Hole Destroy the Earth? (2:08)

Some black holes move from place to place, and one could destroy earth. Learn more about black holes in this HowStuffWorks video.

Stargazers: The Interferometer

Stargazers: The Interferometer (3:00)

The interferometer is a hybrid telescope that will enable scientists to see the surface of stars. The mirrors are optically flat and reflect a true image. Learn more about the interferometer on Discovery Channel's "Stargazers."

Shape of the Universe

Shape of the Universe (2:34)

Learn about the forms and contours of the universe.

Chandra: Measuring Mass in Space

Chandra: Measuring Mass in Space (6:15)

Watch this NASA video to learn more about black holes. Black holes can be described with just two numbers - the mass of the black hole and the speed of the spin. See how NASA scientists determine the mass of black holes in our universe.

Chandra: Radio Galaxies

Chandra: Radio Galaxies (5:20)

Watch this NASA video to see how radio galaxies work. Radio galaxies are important because they carry and transport energy. NASA is learning more and more about these types of galaxies by combining images from several telescopes.

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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.

Exploring Time: Studying Supernovas

Exploring Time: Studying Supernovas (2:39)

What are supernovas and how can they be used to tell how far a star is from Earth? Find out on the Science Channel's "Exploring Time."

100 Greatest Discoveries: The Expanding Universe

100 Greatest Discoveries: The Expanding Universe (2:53)

In 1924, astronomer Edwin Hubble's studies led him to conclude that that the universe is constantly expanding. Learn more about the expanding universe on the Science Channel's "100 Greatest Discoveries.

100 Greatest Discoveries: Planets Orbiting Other Stars

100 Greatest Discoveries: Planets Orbiting Other Stars (2:50)

Thanks to powerful modern telescopes, scientists can now search for other solar systems in the galaxy. Learn more on the Science Channel's "100 Greatest Discoveries."