[ATTACH=CONFIG]7430[/ATTACH][URL="http://www.redorbit.com/news/space/1112425262/black-hole-birth-announcement/index.html"]
http://www.redorbit.com/news/space/1112425262/black-hole-birth-announcement/index.html[/URL]
*good read
"For the first time, astronomers have produced a complete description of a black hole, a concentration of mass so dense that not even light can escape its powerful gravitational pull. Their precise measurements have allowed them to reconstruct the history of the object from its birth some six million years ago."
"Armed with the new, precise distance measurement, scientists using the Chandra X-Ray Observatory, the Rossi X-Ray Timing Explorer, the Advanced Satellite for Cosmology and Astrophysics, and visible-light observations made over more than two decades, calculated that the black hole in Cygnus X-1 is nearly [B]15 times more massive than our Sun and is spinning more than 800 times per second[/B]."