Artist impression of the supermassive black hole in NGC 4151

This is an artist’s impression of the central active region (active galactic nucleus, AGN) of galaxy NGC 4151, containing a supermassive black hole. The blue region in the middle depicts the accretion disk closest to the black hole, spewing out material. Further out is a tumultuous region astronomer call the “broad line region”, and even further out the doughnut-shaped torus is shown.

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