How does GPS actually know your precise location?

GPS knows your precise location by using signals from satellites high above Earth, like how you might use clues to find a hidden treasure.

Imagine you're playing hide and seek with friends in a big park. Each friend shouts out how far away they are from you. You listen carefully and figure out where you must be hiding, based on the sounds you hear. That's kind of what GPS does, but with satellites instead of friends.

Each satellite sends out a special signal that tells the time it was sent. Your phone (or GPS device) receives this signal and figures out how long it took to arrive. Since we know how fast signals travel, like how fast you run in the park, your phone can figure out how far away each satellite is.

By getting clues from at least four satellites, your phone can pinpoint exactly where you are, just like knowing how far you are from four different friends helps you find the best hiding spot!