Quasi-star

Size comparison of a hypothetical quasi-star to some of the largest known stars.
A quasi-star rendered with Celestia

A quasi-star (also called black hole star) is a hypothetical type of extremely massive and luminous star that may have existed early in the history of the Universe. They are thought to have lived around 7-10 million years due to their immense mass.[citation needed] Unlike modern stars, which are powered by nuclear fusion in their cores, a quasi-star's energy would come from material falling into a black hole at its core. They were first proposed in the 1960s and have since provided valuable insights into the early universe, galaxy formation, and the behavior of black holes. Although they have not been observed, they are considered to be a possible progenitor of supermassive black holes.[1]

  1. ^ Battersby, Stephen (29 November 2007). "Biggest black holes may grow inside 'quasistars'". New Scientist.