GALILEO'S TELESCOPE AT 400: From Spyglasses to Hubble

Beyond Galileo's Telescope
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The Hubble Space Telescope, one of NASA's longest running science missions, was released into orbit in 1990 by the space shuttle Discovery (pictured, the 1990 release). As of August 2009, the telescope is still returning images of the universe that dazzle astronomers and the public alike.

But Hubble is about more than pretty pictures: The space telescope has helped astronomers make a number of ground-breaking discoveries, from confirming that black holes exist to discovering new rings around Uranus. (Check out Hubble's 25 "greatest hits" in astronomy.)
— Photograph courtesy NASA via AP
 
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