Deep-Space Photos: Hubble's Greatest Hits

The Hubble Space Telescope is completing its 22nd year in space
NASA / ESA

Dueling Galaxies
About 300 million light years from Earth, twin galaxies face off in the constellation Coma Berenices. The galaxies' dynamic look is belied by their timid nickname; they are known as "The Mice" because of their long, glowing tails.

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