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Raise your glasses as Hubble turns 21

Jonathan Woods writes: The night sky is full of wonders, and Hubble brought us another gem to celebrate its 21st birthday.

Marking the anniversary of its deployment into space, astronomers pointed the space telescope's powerful lens at a pair of interacting galaxies called Arp 273. See highlights from Hubble

Since its launch on April 24, 1990 from space shuttle Discovery, Hubble has sent back stunning images from the far reaches of our solar system.

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