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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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October 10, 2008
The Double Nuclei of a Pair of Colliding Galaxies
The galaxy Arp 220 is actually two galaxies that have been caught in the act of merging. Astronomers think that many galaxies, including our own Milky Way, have undergone similar collisions during their histories.
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October 03, 2008
The Atmosphere of an Exoplanet
An "exoplanet" is an extra-solar planet, that is, a planet orbiting a star other than our own sun. Of the roughly 307 currently known extrasolar planets, about thirty of them transit their star (that is, their orbits take them in front of their star as seen from earth).
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