This sequence begins with the Chandra data, which show the ripples in the hot gas that fills the Perseus cluster. The features were discovered by using a special image-processing technique to bring out subtle changes in brightness. These sound waves are thought to have been generated by cavities blown out by jets from a supermassive black hole(bright white spot) at the center of the Perseus cluster. The Chandra image then dissolves into an artist's illustration of the system, which labels the important features, before returning to the original Chandra data.
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