Satellites

"A satellite is an object that orbits around a larger object."

The first satellite was launched more than 50 years ago and since then thousands have been put into orbit around the earth.

4 main satellites:
1. Imagining satellites that take pictures of earths surface.
2. Communication satellites
3. Navigational satellites
4. International space satellites

On October 4th 1957 the first artificial satellite was put into orbit by the USSR.