Sagittarius A*

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Saggitarius A*
Sagittarius A*.jpg
Saggitarius A* image by Chandra X-Ray Observatory
Observation data
Type Radio source
Right ascension 17h 45m 40.05s
Declination ±-29° 00′ 27.9″
Distance 25900±1400 light years
Constellation Saggitarius
Physical characteristics
Notable features Radio source in the center of the Milky Way
Other designations Sgr A*
See also: Diffuse nebula, Lists of nebulae

Sagittarius A* is a bright object at the center of the Milky Way Galaxy.

History[change | change source]

It was discovered between the 13 and 15 february 1974 by the astronomers Bruce Balick and Robert Brown. It is a radio source, giving off strong radio waves. It is near the border of the constellations Sagittarius and Scorpius. It is part of a larger astronomical feature called Sagittarius A. Astronomers think it is the site of a supermassive (very large) black hole. [1] In 2002, a team of astronomers informed about the movement of the star S2 near Sagittarius A* during a cycle of 10 years. Agreeing with this information, they discard the posibility that said Sgr A* has got dark clusters inside it.

Related pages[change | change source]

References[change | change source]

  1. Reynolds C. 2008. Astrophysics: bringing black holes into focus. Nature 455 (7209): 39–40. Bibcode:2008Natur.455...39R. doi:10.1038/455039a. PMID 18769426.

Other websites[change | change source]

Media related to Sagittarius A at Wikimedia Commons