Essay on satellite

Most of the artificial satellites are in a low Earth orbit (LEO) or a geostationary orbit. To stay in orbit, the satellite's sideways speed must balance the force of gravity. Satellites in low orbit are often less than one thousand kilometers above the ground.

There are weather satellites, communications satellites, navigation satellites, reconnaissance satellites, astronomy satellites and many other kinds. Arthur C. Clarke popularized the idea of the communications satellite.

A satellite is an object that orbits another object. In space, satellites may be natural, or artificial. The moon is a natural satellite that orbits the Earth. Most artificial satellites also orbit the Earth, but some orbit other planets, or the Sun or Moon.

The moon is a natural satellite that orbits the Earth. Most man-made satellites also orbit the Earth, but some orbit other planets, or the Sun or Moon. Satellites are used for many purposes. There are weather satellites, communications satellites, navigation satellites, reconnaissance satellites,...