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galactic nucleus |
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galactic nucleus [gə′lak·tik ′nü·klē·əs] (astronomy) The center area in the galaxy about which there is a large spherical distribution of stars and from which the spiral arms emanate. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| nbsp;core not powered by starlight is known as an active galactic nucleus. provides what may constitute the strongest case yet for a supermassive black hole in a galactic nucleus," writes Richard Barvainis of the Massachusetts Institute of Technology's Haystack Observatory in Westford. Jaffe of the State University of Leiden in the Netherlands, the Hubble image provides the closest look yet at the center of a type of galaxy -- called an active galactic nucleus (AGN) -- that has a luminous, energetic core. |
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