How Do We Know Where We Are in the World?

Imagine your phone is like a detective, and the GPS satellites are its helpers. They send messages to your phone telling it how far away they are. Your phone uses those clues to guess where you must be, kind of like finding a treasure map by measuring distances from different points.

Each satellite sends a signal that includes the time it was sent. Your phone checks how long it took for the signal to arrive, and uses that information to figure out how far away the satellite is. By doing this with several satellites at once, your phone can pinpoint exactly where you are on Earth.