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Hans Sotin



2,793 Plays



July 29 A false-color photograph of NGC 1097, a barred spiral galaxy about 45 million light-years away in the constellation Fornax. The galaxy was discovered by William Herschel on 9 October 1790. It has a supermassive black hole at its center, which is 140 million times the mass of the Sun, as well as two satellite galaxies. The photograph was taken in infrared light by the Spitzer Space Telescope. Photograph: NASA/JPL-Caltech Wikipedia is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other projects: This Wikipedia is written in English. Started in 2001 (2001), it currently contains 4,930,171 articles. Many other Wikipedias are available; some of the largest are listed below.