Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with supermassive black holes, surrounded by ... X-Ray Flashes from a Nearby Supermassive Black Hole ...
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D.C.’s Panda-Themed Bar Has ArrivedThe Bamboo Bar at Duke’s Counter, located right across from the Smithsonian National Zoo’s entrance, opens indefinitely ...
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