What do we know about black holes?

Dead stars, reawakening monsters and star-eaters.

July 31, 2020 |  Categories:  Space  

By Nolan Cooper, Astronomer

Black holes are so famous nowadays. Everyone's talking about them, but none of us humans actually know quite a lot about them. Well, here's what we do know.

Black holes are formed when big stars, really big stars, not medium-sized stars like our very own Sun or puny stars, like Proxima Centauri, the nearest star to home, but huge stars, collapse.

Huge stars use more fuel to keep burning. Small Stars don't have so much mass and don't occupy too much volume to use a lot of fuel. That's why huge stars collapse earlier than smaller stars, because, the huge stars run out of fuel after just a few billion years of life and "die", WAY before smaller stars. That's when a black hole forms. When large stars collapse under their own weight, it creates a BANG, called a supernova, which causes a catastrophic expulsion of its outer material. having exhausted all their fuel, rapidly smallen, and, within a flash, the huge star is smaller than the size of an atom. This state of a star is called the singularity. In the singularity, a star becomes a monster containing zero volume, but infinite density. It is this seemingly impossible contradiction that causes a black hole to form.

A black hole is impossible to escape.

black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. ... This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.

Ok, so, now what is space-time?

Well, space-time is what holds everything up. Its a lot like a fabric, an elastic fabric that everything sits on. Earth is situated on top of space-time, the Sun is too, the entire Solar System is, so is the entire Milky Way Galaxy, and so is everything in the Universe. It may sound unrealistic and too simple for it to be the answer to all motion in large scales, but it has never been proved wrong yet. The General Theory of Relativity and the Special Theory of Relativity, both by Einstein, kind of circulate around the space-time fabric concept.

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