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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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| Research | Weekly Science Update | |||||||||||||||||||||||||||||||||||||||
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January 09, 2009
Our Galactic Neighborhood
Our Milky Way galaxy is not alone in its cosmic neighborhood. It belongs to the “Local Group,” a set of about 30 galaxies that are held together by their mutual gravitational attraction.
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January 02, 2009
Standard Candles
In 1929, Edwin Hubble discovered that galaxies are moving away from us by his observations of their Cepheid stars.
Read More...
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