ELI5: Explain Like I'm 5

Space geodesy

Space geodesy is like playing hide and seek across Earth and space. We have a lot of toys and tools that help us find things and locate where they are. By measuring how far apart things are, and how things move in space, we can tell where places are on Earth or in space.

Imagine playing hide and seek with your friends. If you were to stand in one spot and shout out, "I'm over here!" your friends would know where you are. Now imagine you are playing hide and seek around the whole Earth. If you shout out, "I'm over here!" it's a little harder for your friends to find you.

Space geodesy helps us find things on Earth or in space in the same way. It uses a lot of toys and tools like lasers and GPS devices to measure distances and movements very accurately. This way, we can tell where things are located and how they are moving in space.

By doing this, scientists can learn about the Earth's shape and size, and how it moves in orbit around the Sun. They can also learn about other planets and moons in our solar system and how they move around each other.

So, space geodesy is like playing hide and seek on a big scale, with lots of toys to help us find things and figure out where they are.
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