Editor's note: These have been pulled together into a photoset, Comet Lovejoy, at www.flickr.com/photos/28634332@N05/sets/72157628637946049/
Comet Lovejoy is visible near Earth's horizon in this nighttime image photographed by NASA astronaut Dan Burbank, Expedition 30 commander, onboard the International Space Station on Dec. 22, 2011.
Image credit: NASA
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