Today there are many artificial satellites that revolve round the Earth. Why is all the time, money and effort required to launch them considered worthwhile? The answer is that the satellite performs many useful scientific tasks as it journeys through space.
Artificial satellites can act as spies that seek out military installations and equipment on the Earth below. Another function is communications between distant points of the globe.
They can study the solar radiation and environment of space and this knowledge helps us to understand the forces at work on our own planet and the causes of natural phenomena which effect our living conditions.
Meteorological satellites also exist which record details of weather conditions throughout the world and help in weather forecasting.
Picture Credit : Google
