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Extras

Video thumbnail: Science Trek D4K: Galaxies Video Short

Science Trek

D4K: Galaxies Video Short

The universe is made up of billions of galaxies. But what is a galaxy? Find out here.

D4K: Galaxies Video Short

Video thumbnail: Science Trek D4K: The Web Show: Galaxies

Science Trek

D4K: The Web Show: Galaxies

Find out what it takes to be an astrophysicist and study galaxies on this D4K Web Only.

D4K: The Web Show: Galaxies

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