Star Impact 2.jpg Supermassive Sphere Brightens Post-Impact
In this second artist's impression a huge sphere in the center of a galaxy is shown after a star has collided with it. Enormous amounts of heat and a dramatic increase in the brightness of the sphere are generated by this event. The lack of observation of such flares from the center of galaxies means that this hypothetical scenario is almost completely ruled out. (Mark A. Garlick/CfA)
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