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Have we found black holes?

There is now a great deal of indirect astronomical observational evidence for black holes in two mass ranges:

  • stellar mass black holes with masses of a typical star (4–15 times the mass of our Sun), and
  • supermassive black holes with masses perhaps 1% that of a typical galaxy

 

Location of the X-ray source Cygnus X-1 which is widely accepted to be a 10 solar mass black hole orbiting a blue giant star

Location of the X-ray source Cygnus X-1 which is widely accepted to be a 10 solar mass black hole orbiting a blue giant star
 

All text of this article available under the terms of the GNU Free Documentation License (see Copyrights for details).

 



 
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