==References==== External links ==* Chandra images of starburst galaxy M82* NASA press release for discovery of IMBHs by Hubble Space Telescope* A New Breed of Black Holes, by Davide Castelvecchi Sky & Telescope April 2006
* Chandra images of starburst galaxy M82* NASA press release for discovery of IMBHs by Hubble Space Telescope* A New Breed of Black Holes, by Davide Castelvecchi Sky & Telescope April 2006