ELI5: Explain Like I'm 5

Kerr–Newman metric

Okay, so imagine you are on a really bouncy trampoline, like the ones you jump on at a party. Now, let's imagine that the trampoline is actually the universe and you are trying to measure distances and time on it.

The Kerr-Newman Metric is a way for scientists to describe how gravity affects the shape of the universe when there is a spinning, electrically charged object in it (like a star). It's a fancier version of using a ruler and stopwatch to measure how the universe behaves.

Just like how the trampoline stretches and warps when you jump on it, objects in the universe can warp space and time around them because of their gravity. The Kerr-Newman Metric helps us calculate how much space and time are warped around these objects, so we can better understand how the universe works.

Scientists use the Kerr-Newman Metric to study things like black holes, which are super heavy objects that have so much gravity that even light can't escape them. By understanding how gravity affects space and time around a black hole, scientists can learn more about what happens inside them and how they form.

So, the Kerr-Newman Metric is basically a really useful tool for scientists to understand how gravity works in the universe, kind of like a giant ruler and stopwatch for the universe!