A newly discovered black hole is reported to be how many times the size of the sun?

The correct answer states that the newly discovered black hole is reported to be 300 million times the size of the sun. This measurement refers to the mass of the black hole in solar masses, which is a common way to express the size of celestial objects in astrophysics. Understanding the scale of black holes is crucial, as they can vary greatly in size, from stellar black holes that are a few times the mass of the sun to supermassive black holes that can be millions or billions of times greater.

In this case, a black hole with a mass of 300 million solar masses indicates a supermassive black hole, typically found at the centers of galaxies. Such a significant mass allows it to exert tremendous gravitational influence over its surroundings, affecting not only the stars and gas in its vicinity but also the dynamics of galaxies as a whole. This discovery expands our understanding of black hole formation and evolution in the universe.

The other options present significantly higher or lower masses that do not align with current astronomical observations. For instance, values like 150 million, 200 million, or 400 million solar masses could lead to misconceptions regarding the typical mass ranges we encounter with specifically observed black holes, making 300 million the most accurate answer for this discovery.