ELI5: Explain Like I'm 5

Rosen coordinates

Okay kiddo, so imagine you are playing hide and seek in a really big house with your friends. Your friend Jake is counting to ten while the rest of you hide.

Now, let's imagine that you are hiding behind a big couch in the living room. Jake finishes counting and comes to find you. But how can he know where you are?

That's where Rosen coordinates come in handy! It's like a map that shows where you are hiding in the house. Just like how a map can show you where different places are in your town or city.

Now, let's say your hiding spot is the "X" on the map. Rosen coordinates describe where that "X" is in relation to other things in the room. For example, the "X" might be two feet away from the couch and four feet away from the TV.

Rosen coordinates are important because they help us describe where things are in space. Just like how Jake needs to know where you are hiding in the house, scientists and engineers need to know where things are in order to build and study things like spaceships and airplanes.

So, in summary, Rosen coordinates are like a map that helps us describe where things are in space, just like how a map helps us find things in our town or city.