What are black hole mergers?

A black hole merger is when two super-heavy space objects crash together and become one.

Imagine you have two really strong kids on a playground swing, they’re both swinging high, going back and forth. Now imagine those two swings suddenly collide in the middle of their swing. That’s kind of like what happens with black holes.

Black holes are like super-heavy balls that pull everything around them because they're so heavy. When two black holes get close enough, they start to dance, spinning around each other faster and faster, like a pair of ice skaters twirling together.

Then boom! They crash into one another, sending out big ripples in space, kind of like when you drop a stone into a pond and the water splashes up. These ripples are called gravitational waves, and scientists can feel them here on Earth with special machines that listen for vibrations in space.

After they merge, the new black hole is bigger than either one was before, just like if two heavy kids crashed together and became one super-heavy kid!