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The Smithsonian Astrophysical Observatory (SAO) is a "research institute" of the Smithsonian Institution. It is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA). Because these research activities share Harvard and Smithsonian staff and resources, the links at this website will take you to information posted on the "CfA" pages.
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Weekly Science Updates
May 04, 2012Diagnosing a Black Hole FlareBlack holes can come in a wide range of masses. Some, with only about one solar mass, result from the supernova death of a massive star, while those at the center of galaxies (called supermassive black holes) have millions or even billions of solar masses. Read More...
April 27, 2012X-ray Quasars, and a Distance RecordQuasars are thought to be galaxies whose bright nuclei contain massive black holes around which disks are actively accreting matter. Read More...
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