What is Kerr?

Kerr is a special kind of spinning ball that twists space and time around it like a whirlpool.

Imagine you're playing with a toy top, when you spin it really fast on the floor, it creates a little swirl in the air around it. That's kind of what Kerr does, but way bigger, it’s like a giant spinning ball made of super-dense matter, and it affects everything near it.

If you drop a pebble into a whirlpool, it gets pulled in and spins around the middle. The same thing happens with Kerr, space and time get twisted around it like a whirlpool, and anything that comes close (like light or other stars) gets pulled into this spinning motion too.

Think of Kerr as a super fast-spinning star made of something really heavy. It’s not just spinning, it's twisting the very fabric of space around it. This is how some black holes work, and it helps scientists understand how gravity can be both strong and twisty.

So next time you spin your toy top, remember, you're doing a little Kerr of your own!