Hanny van Arkel had been using the Galaxy Zoo Web site less than a week when she noticed something odd about the photograph of IC 2497, a minor galaxy in the Leo Minor constellation. “It was this strange thing,” she recalled: an enormous gas cloud, floating like a ghost in front of the spiral galaxy.
A Dutch schoolteacher with no formal training in astronomy, Ms. van Arkel had joined tens of thousands of other Web volunteers to help classify photographs taken by deep-space telescopes. Stumped by the unusual image on her computer screen, she e-mailed the project staff for guidance. Staff members were stumped, too. And thus was christened the celestial body now known to astronomers worldwide as Hanny’s Voorwerp (Dutch for “object”).
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Author: ALEX WRIGHT
