How do Black Holes form?
Stellar Black Holes
Stellar Black Holes form by a star that is 8 or more times the mass of the sun collapse on itself because it ran out of fuel. It explodes as a supernova, leaving behind a black hole.
Credits: NASA
Supermassive Black Holes
Supermassive black holes are another story. These are way too massive to have been created by one star collapsing; no one knows how they form still. Black holes can swallow other black holes, so it’s possible that the supermassive ones are made of many small black holes combined together. However, all of this is speculation, so we don’t really know.
Credits: University of Chicago
What are the parts of a black hole?
Event Horizon
The event horizon is the “point of no return.” It is a border between the universe and the inside of the black hole. When you cross this border, you can not escape the black hole. Even when light reaches it, it cannot escape.
Credits: NASA
Singularity
The singularity is the center of a black hole. This is where all matter gets crushed into a single point, ceasing to exist. You don’t die in a black hole because of that, though. (More on that later.) Most of this is just speculation, though.
Credits: NASA
