Black Holes Have Simple Feeding Habits

At the centre of spiral galaxy M81 is a supermassive black hole about 70 million times more massive than our sun.

Image Credit: X-ray: NASA /CXC /Wisconsin /D.Pooley & CfA /A.Zezas; Optical: NASA /ESA /CfA /A.Zezas; UV: NASA /JPL-Caltech /CfA /J.Huchra et al.; IR: NASA /JPL-Caltech /CfA