Black holes are not made of matter, but by space and time
Black holes are very cold, close to absolute zero. They are unable to emit radiation because they are made of warped space and time
Black holes are an enormous source of energy - 40% of the energy can perhaps be harnessed
Black holes are insane --- if you fell into one, you could see the start and the end of the universe, Big Bang and all.
A black hole is theoretically a potential within all matter. If squeezed tightly enough, earth would become a black hole the size of a peanut.
A black hole is an entity whose singularity's density is, oddly, infinite.
A black hole's mass and energy is not in the singularity at its center but in the very curving of space and time created when the star that made it exploded
The 2019 photo of the black hole required 5 petabytes of data processed with half a ton of hard drives.
A black hole is not just a bending of space but also time slowing relatively closer to its center.
Black holes are likely very small --- perhaps even as small as one atom in size.
An amoeba is basically a blob that absorbs anything it comes in contact with
Black holes are rotational, typically spinning like a planet on an axis at almost the speed of light with larger black holes. A giant blackhole can be spinning at a rate of one revolution every 10 minutes to an hour
A black hole is surrounded by a photo sphere so if you were to stop there, you could look at the back of your own head because the photons that hit your eye would orbit all the way around the black hole.
In our galaxy alone, black holes exist on the order of a hundred million. These are generally only about 10 miles across but each weighs as much as ten suns
Black holes might be as small as one atom in size.
Black holes are surfaced by a horizon; which is not a material, but is simply the warping of space and time. If you fall across the horizon, you wouldn't know it; and yet you'd never be able to escape
A black hole is a celestial object whose nothingness generates a sound in the key of B flat
The Milky Way galaxy has a black hole at its center millions of times the mass of the Sun. (a million times is roughly the difference between the thickness of 1 sheet of paper and a 30 story building)