NASA’s Fermi Mission Finds Hints of Gamma-ray Cycle in an Active Galaxy kit Posted on November 13, 2015 Posted in Aggregated No Comments Supermassive black holes weighing millions of times the sun’s mass lie at the hearts of most large galaxies. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email