"The Hubble Space Telescope captured this image of the Southern Pinwheel Galaxy, one of the largest and closest galaxies of its kind. <a href=""http://www.spacetelescope.org/news/heic1403/"" target=""_blank"">The center of the galaxy is mysterious</a>, researchers say, because it has a double nucleus -- a supermassive black hole that may be ringed by a lopsided disc of stars, giving it the appearance of a dual core."
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