RT @AstronomyNow: X-ray telescopes find evidence for wandering black hole astronomynow.com/2016/10/06/x-r… https://t.co/OQeMC9R49i
RT @AstronomyNow: X-ray telescopes find evidence for wandering black hole astronomynow.com/2016/10/06/x-r… https://t.co/OQeMC9R49i