Post #14

Look, Ma, four cavities! A pair of supermassive black holes could be behind a set of cosmic cavities, or bubbles, recently spotted by our orbiting NASA chandraxray observatory. The four bubbles were detected 3.9 billion light-years from Earth in a galaxy cluster, a collection of hot gas, dark matter and thousands of galaxies that is among the largest structures in the universe held together by gravity. Many galaxy clusters have a pair of cavities, caused by a single black hole spewing out twin streams of matter from the cluster's center, but this is the first known instance of a galaxy cluster with four massive bubbles instead of two. Astronomers hypothesize that a single black hole which quickly flipped on its side could also be behind this galactic oddity. These images show the galaxy cluster RBS 797 as seen in X-rays by Chandra, visualized here in blue and white, alongside a photo of the cluster as seen in visible light by NASA hubble.