How Do Satellites Stay Up?
Why don't the communication satellites crash back to Earth?
How Do Satellites Communicate?
Using high-frequency radio waves or lasers transmitted through the vacuum of space.
How Do Satellites Stay in Orbit?
Balancing the speed of the satellite with the gravitational pull of the Earth.
How Do Satellites Take Pictures?
Using digital sensors and line scanners to image the Earth from orbit.
How Does GPS Work?
The network of satellites and strict timing used to pinpoint your global location.