This was only the fifth time in history that a spacecraft came close enough to view a comet's core.
New photos show close-up of Comet Hartley 2
LOS ANGELES Comet Hartley 2 is 1.36 miles across. The probe flew through the comet's diffuse corona at about 27,000 miles an hour and came within 435 miles of its icy, dirty core.
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