Question

What is the life span of satellites? What happens to them once they complete their service?

Answer 1

LIfe span of low earth satellites is about 5 to 10 years.

Explanation:

Geosynchronous satellite will have higher life span.
Due to drag of atmosphere satellite loose their altitude and we have to boost them up..So it require fuel and once fuel is finished they will llose orbit and burn in the atmosphere.