Quasi-Star
A quasi-star is a hypothetical type of extremely massive and luminous star that may have existed very early Universe. Unlike convential stars, which are powered by nuclear fusion, a quasi-star’s energy would come from material falling into a black hole at its core. These Stars would’ve had a very short lifespan; only living a maximum of 7 million years. Their diameter could have been 10 billion km+ or 66.85 AU+ and could’ve had a mass 1000+ times more than our sun. Here, it is compared to the largest star currently we know, Stephenson 2-18. There surface would exceed around 4,000 Kelvin, or 3,727 Celcius. In our Solar System, this star would extend past Neptune!
