An artificial body placed in orbit around the earth or another planet in order to collect information or for communication. a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites. The Moon is a natural satellite of the Earth.
The world's first artificial satellite, the Sputnik 1, was launched by the Soviet Union in 1957. Since then, thousands of satellites have been launched into orbit around the Earth. Some satellites, notably space stations, have been launched in parts and assembled in orbit.
Satellites draw the energy required for their functioning from the sun. Satellites have solar panels, like wings, which receives light from sun and turn them into electricity.
Satellites support weather forecasting, military services, researches, communication and broadcasting.