Comparison of galaxies

IC 1101 is a class S0 supergiant (cD) lenticular galaxy at the center of the Abell 2029 galaxy cluster. It has an isophotal diameter at about 123.65 to 169.61 kiloparsecs (400,000 to 550,000 light-years). It possesses a diffuse core which is the largest known core of any galaxy to date, and contains a supermassive black hole, one of the largest discovered.The galaxy is located at 354.0 megaparsecs (1.15 billion light-years) from Earth. The galaxy was discovered on 19 June 1790, by the British astronomer William Herschel.

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