Could a rise in star formation signal the end of a galaxy’s life?
NASA’s Goddard Space Flight Center/Jeremy Schnittman
Scientists believe a supermassive black hole sits at the center of most, if not all, massive galaxies. When such a black hole is active, it’s known as an active galactic nucleus (AGN).
Marc Ward/Stocktrek Images/Stocktrek Images/Getty Images
An AGN can emit so much energy as it accretes gas that it outshines the rest of the host galaxy.