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The Centaurus A Galaxy (also known as Centaurus A, Peculiar Galaxy NGC 5128, NGC 5128 or Caldwell 77) is the closest active galaxy to Earth, being a radio galaxy. On March 14, 1998 the Hubble telescope offered a close-up view of a turbulent firestorm of star birth along a nearly edge of the galaxy. Centaurus A is part of the M83 Group galaxy cluster.