noun

A black hole is a kind of monster that lives in space. It is so big and powerful that it sucks in anything around it. Even light can't escape it. It's like a giant vacuum cleaner that's always hungry and never stops eating.

Example

1. Scientists believe that a supermassive black hole lies at the center of our Milky Way Galaxy.
2. Astronomers study the effects of black holes on their environment by tracking the motion of stars and gas in their vicinity.
3. When two black holes merge, they send out powerful gravitational waves that are detectable with specialized instruments.