Sagittarius A*
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Sagittarius A* is a bright and very compact source of radio emission at the centre of the Milky Way Galaxy, part of a larger astronomical feature at that location (Sagittarius A). Although not completely certain, it is regarded by most astronomers to be a supermassive black hole, composed of matter equivalent to about a million suns (our sun's mass is approximately 2 x 1030 kg, making Sagittarius A* 2 x 1036 kg).
External links
- The Galactic Center (http://archive.ncsa.uiuc.edu/Cyberia/Bima/GalCntr.html)