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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
March 01, 2013An Updated List of Potential ExoplanetsThere are currently 861 exoplanets (planets around other stars) according to the official exoplanet encyclopedia website. Read More...
February 22, 2013Diagnosing the X-Ray Variability of a Galaxy's NucleusAn active galaxy is one whose nucleus contains a massive black hole that is vigorously accreting material. In the process, the nucleus typically ejects jets of particles and radiates brightly at many wavelengths, in particular at X-ray wavelengths. Read More...
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| Our Solar System | Stars, Planets & Origins | |
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| Galaxies | Cosmology | |
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| Laboratory Astrophysics | Extreme Astrophysics |
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