Black holes in the milky way galaxy.
Extremely strong observational evidence has recently been found for the presence of black holes orbiting a few relatively normal stars in our Milky Way Galaxy and also at the centers of some galaxies. The former generally have masses of 4-16 times the mass of the sun, whereas the latter are "supermassive black holes" with millions to billions of solar masses. The evidence for a supermassive black hole in the center of our galaxy is especially strong.
Filippenko
A V
AV
Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720-3411, USA. alex@astro.berkeley.edu
D055580:Astronomical Phenomena; D001256:Astronomy; D006112:Gravitation