Learn how computer modeling indicates that supermassive black holes may exist at the centers of all galaxies, in this video from NOVA: Black Hole Apocalypse. Using data from the Hubble Space Telescope, researchers analyze the average motions of stars orbiting the center of a galaxy. They then create mathematical computer models of galaxies, making a library of thousands of variations with different values for factors such as stellar mass and velocity. Their goal is to find models that match Hubble data. They have found that, for almost all galaxies, a supermassive black hole must be present at the center of the galaxy for the model to match the observations. This resource is part of the NOVA: Black Hole Apocalypse Collection.
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