How do maps know where you are using special signals from the sky?

Maps know where you are by using special signals from satellites that float up high in the sky, like little helpers watching over you.

Imagine you have a toy car, and it has a tiny radio. When you press a button, your toy car listens to a signal coming from another toy in the room, and then it knows exactly where it is. That’s kind of how your phone or tablet works when it uses GPS (which stands for Global Positioning System)!

The satellites send out signals that travel down to Earth, just like a message sent from one friend to another. Your phone listens for these messages and calculates how long it took for them to arrive, like counting how many seconds pass between when you say “hello” and your friend says back “hi!”

By using signals from at least four satellites, the map can tell exactly where you are on Earth, like a puzzle piece fitting perfectly into a bigger picture. It's not magic, it’s just clever math and signals flying through the sky!