Astronomers say the black hole called Sagittarius A* grew 75 times brighter in just two hours. A black hole with several billion times the mass of the sun presumably squats at the center of the Ophiuchus cluster, in a galaxy known only by a number, WISEA J171227.81-232210.7. At a Glance. Ton 618 is also one of the biggest black holes. It is closely followed by the S5 0014+82. It is estimated to have a mass of six hundred and sixty times the size of the Sun. B) can be no more than 1.4 solar masses, according to Chandrasekhar. Other Massive Black Holes. A black hole is a place in space where gravity pulls so much that even light cannot get out. Up next are the intermediate-mass black holes, like this one. But the largest of these fiery bodies, those at least 10 to 20 times as massive as our own sun, are destined to become either super-dense neutron stars or so-called stellar-mass black holes. 74) The largest known black holes A) create the dark nebulae in the plane of the Milky Way. These types of black holes are also called collapsars. TON-618 has become a hot topic in the study of black holes in recent years as it sits as the most massive known in the universe. This hole measures four hundred times the mass of the Sun. Black holes may solve some of the mysteries of the universe. The monster black hole is the equivalent of 17 billion suns. The fourth largest hole is called the SDSS ji12325.31+514252.0. The third type, known as the stellar black hole or stellar mass black hole is formed when a massive star collapses. The supermassive black hole at the center of the Milky Way suddenly lit up in May. Their masses range from five (5) to a hundred (100) solar masses and can be observed as either a gamma ray burst or a hypernova explosion. Black hole blast called largest ever in universe ... Scientists reported Thursday that the blast came from a black hole in a cluster of galaxies 390 million light-years away. Two large black holes crashed together and formed a massive new one — the largest of its kind ever detected, so large that physicists weren't sure it could exist at all. This huge galaxy has the biggest black hole ever measured The monster black hole in galaxy cluster Abell 85 is roughly the size of our solar system, but packs the mass of 40 billion suns. Scientists have discovered what may be the biggest black hole yet known in a small faraway galaxy. While we tend to think of black holes as giant cosmic vacuum cleaners, it’s not all one-way travel. In another galaxy, called M33, there's a black hole that is 58 miles across and packs as much mass as 15.7 suns inside.