A2261

A2261 is a galaxy cluster located about 3 billion light-years from Earth. It is one of the most massive and luminous groups of galaxies, held together by gravity, with thousands of individual galaxies and vast amounts of hot gas and dark matter. Studying such clusters helps scientists understand how the universe's large-scale structures form and evolve over time. A2261 is particularly notable for its dense core and the supermassive black hole at its center, which may have been ejected or is growing, offering insights into galaxy and black hole interactions on cosmic scales.