Black holes by supernova Firstly, a black hole isn't really a hole at all, but that's the easiest way to think of its effects on the rest of the universe. Take a star that's at least thirty times larger than our sun and make it explode (called a supernova). Stars do that at the end of their lifetime, sometimes leaving a remnant of the violent explosion. The nature of the remnant depends on its mass. …showed first 75 words of 552 total…

…showed last 75 words of 552 total…ing the core (which is very hot metal) condenses all the matter together. No more electron shells and orbits --- the neutrons are forced together. Then, the very neutrons themselves give up and get squished by the pressure, and the star keeps on collapsing. See, there's this certain radius that determines whether the star can squish itself into a black hole. It's called the Schwarzschild Radius (swar - shild). If the starstuff can collapse itself