A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth.Communications satellites are used for television, telephone, radio, internet, and military applications. As of 1 January 2021, …

The Defense Satellite Communications System (DSCS) is a United States Space Force satellite constellation that provides the United States with military communications to support globally distributed military users. Beginning in 2007, DSCS is being replaced by the Wideband Global SATCOM system. A total of 14 DSCS-III satellites were launched between the early 1980s and …

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. Satellites are used for many purposes. There are weather satellites, communications satellites, navigation satellites, reconnaissance ...