Satellites are used for a large number of purposes. Communication satellite types include military and civilian Earth observation satellites, , navigation satellite, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known classes include low Earth orbit, polar orbit, and geostationary orbit.
Setellite
Satellites are used for a large number of purposes. Communication satellite types include military and civilian Earth observation satellites, , navigation satellite, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known classes include low Earth orbit, polar orbit, and geostationary orbit.