What is satellite ? 

Def : satellite is a body (natural or artificial) which revolve around the earth in circular orbit 


What is period of satellite ?

The time taken by satellite to complete one Revolution around the planet is called as period of satellite


Binding energy of satellite

The minimum amount of energy required for satellite to escape from Earth's gravitational influence is called as binding energy of satellite


What is communication satellite ? 

Communication satellite is an artificial satellite which revolve around the earth in its equatorial plane


Uses of communication satellite

1) for TV broadcasting

2) for telecommunication

3) for military purpose

4) for weather information