PICTURES: Comet Hartley 2 Seen Close-Up by NASA EPOXI Mission

Thirteen million miles out in space, a NASA probe called Deep Impact has flown within 435 miles of Comet Hartley 2, and the early pictures are a sight to behold. This is only the fifth time a spacecraft has ever come close enough to a comet to take pictures. What you see is not the standard image of a long, filmy tail; Hartley 2 is more than 100 million miles from the sun, and too cold to be streaming water vapor the way comets do when they come closer. In the 1950s astronomer Fred Whipple...Full Story
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