In November 2004 a team of astronomers reported the discovery of GCIRS 13E orbiting three light - years from Sagittarius A * .
The discovery of GCIRS 13E is the first intermediate - mass black hole in our galaxy .
In November 2004 a team of astronomers reported the discovery of GCIRS 13E , the first intermediate - mass black hole in our galaxy , orbiting three light - years from Sagittarius A * .