[ispom]

Astronomers have made the first quantitative measurements of the spin of several supermassive black holes:

http://www.newsdesk.umd.edu/images_r...Storm-72sm.jpg

http://www.newsdesk.umd.edu/scitech/print.cfm?articleID=1447

But I’d read anywhere how fast rotates the Black hole in our Galactic Centre

or do I err