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A composite image from NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) and the European Southern Observatory in Chile shows the Sculptor galaxy in this image released June 11, 2013 by NASA. Visible data from the European Space Observatory show the backbone of the galaxy made up of stars, while NuSTAR data, which appear as colored blobs, show high-energy X-rays. The NuSTAR observations are the sharpest ever taken of this galaxy in high-energy X-rays. The findings, when combined with those from NASA's Chandra X-ray Observatory, suggest that the supermassive black hole at the center of the Sculptor galaxy, also known as NGC 253, has dozed off, or gone inactive, sometime in the past decade. (Photo by Reuters/NASA/JPL-Caltech/JHU)
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