This article is about Quasi Stars. Extremely massive star-like objects that are not powered by nuclear fusion like other stars do.

Instead of nuclear fusion, it’s the material falling into a central black hole that gives these stars their energy.

Some scientists call these stars black hole stars.

A Quasi-star is a hypothetical type of star that contains a black hole at its core.

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The existence of bright quasars at high redshifts implies that supermassive black holes were able to form in the early Universe.

These monstrous ancient black holes could have formed deep within giant star-like objects.

Estimations show that when a massive gas cloud, or a large protostar, collapses under gravity, it could form a small black hole at its core, giving rise to a quasi-star.

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In 2006, Mitchell Begelman, a Professor in the Department of Astrophysical and Planetary Sciences at the University of Colorado in Boulder, published some calculations suggesting that such a black hole could quickly grow to 1000 times more massive than the sun by feeding on the gas shrouding it.

Eventually, it would become a supermassive black hole. Normally the formation of a black hole would release so much energy that the outer layers of the star would be driven away, simply leaving a black hole.

In this case, however, the quasi-star is so massive that that doesn’t happen.

Such a star would have to be at least one thousand times the mass of the Sun. Also, it would produce as much light as a small galaxy.

Stars this large could only form early in the history of the Universe before the hydrogen and helium were contaminated by heavier elements. But as I mentioned earlier, as of now, quasi-stars are purely hypothetical.

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