Black Hole Sound Waves
September 10, 2003 | Source: Science@NASA
Sound waves 57 octaves lower than middle-C are rumbling away from a supermassive black hole in the Perseus cluster. The “note” is the deepest ever detected from any object in our Universe. The tremendous amounts of energy carried by these sound waves may solve a longstanding problem in astrophysics: how galaxy clusters, the largest structures in the Universe, grow.