"The black holes are separated by an estimated distance of less than a third of a light-year - cheek-to-cheek by black hole standards and significantly more than the postulated binary system spotted by the Chandra X-ray Observatory in 2003.
The pair are estimated to dance around one another every 100 years"
3.142 x .33 light years would suggest an orbit of about 1 ly - so sounds like they are going at c/100! Is my arithmetic right? If so, the mind truly boggles.
Dancing Black Holes
