Online snaps of comet used to determine its orbit
Some people scour the Internet for pictures of celebrities and cats.
Others search for comets.
After performing a Yahoo! image search for photos of Comet Holmes, which whizzed by Earth in 2007, a team of astronomers used the returned images to reconstruct the comet’s orbit in three dimensions — proving that astronomers can take advantage of data provided by an unwitting group of participants.
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