Since I wrote way too much about Black Holes, I didn’t have the space to write on their size in part three. So today I’m writing a bonus part, to go over the size of Black Holes.
The smallest Black Holes we know of may not even exist. They are called Primordial Black Holes. Scientists theorise that in the insane density of the very early universe, any pocket of mass just slightly denser than the next would collapse into a Black Hole. These Black Holes would be about the size of a proton, and yet they would weigh as much as whole mountains. Scientists speculate they may be the “Dark Matter” that holds together galaxies.
Next up are Stellar Black Holes. These we definitely know exist. They are usually only the size of a city, and yet they can weigh as much as the sun. There is an unnamed Black Hole throwing around the red giant star V723. V723 is 9.74 million miles in diameter, 21 times as large as the sun, and is about the sun’s weight. It’s currently forced to orbit a Black Hole 11 miles in diameter, that weighs three times the sun.
Next in line are Supermassive Black Holes. These Black Holes are nuts. Sagittarius A, the Black Hole at the center of our galaxy, is 4 million times heavier and 40 million times larger than the sun. These Black Holes are the seeds for Quasi-Stellar radio sources, but I’ll get into those in a different essay. Anyway, they are really, really big. In fact, the first Black Hole we got a picture of was M87, a Supermassive Black Hole at the center of the Messier 87 galaxy.
Then there are Ultramassive Black Holes. These giants are insane in their size and weight, said to be the largest single things in the universe. TON 618 is a Black Holes that is 66 billion times heavier, and is about 57,114,947,999,134,622 miles wider than the sun. For you math nerds, that’s 1.32 x 10^11 times larger than the sun. You could fit 11 solar systems end to end in its Event Horizon.
Not much else to say. I’ll go over Quasars next time, and Black Hole Stars after that. Until then, watch this.
Credits:
The Wooshing King 