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This is an accepted version of this page This is the latest accepted revision, reviewed on 23 February 2025. Objects intentionally placed into orbit This article is about human-made satellites. For moons, see Natural satellite. For other uses, see Satellite (disambiguation). Two CubeSats orbiting around Earth after being deployed from the ISS KibÅ module's Small Satellite Orbital Deployer A ...
A satellite state or dependent state is a country that is formally independent but under heavy political, economic, and military influence or control from another country. [1]
Satellite imaging of the Earth surface is of sufficient public utility that many countries maintain satellite imaging programs. The United States has led the way in making these data freely available for scientific use. Some of the more popular programs are listed below, recently followed by the European Union's Sentinel constellation.
The satellite broadcasts a signal that contains orbital data (from which the position of the satellite can be calculated) and the precise time the signal was transmitted. Orbital data include a rough almanac for all satellites to aid in finding them, and a precise ephemeris for this satellite.
The term satellite thus became the normal one for referring to an object orbiting a planet, as it avoided the ambiguity of "moon". In 1957, however, the launching of the artificial object Sputnik created a need for new terminology. [5] The terms man-made satellite and artificial moon were very quickly abandoned in favor of the simpler satellite ...
Satellite cities are often separated from the central city by a substantial belt of rural or suburban territory, while twin cities may be fully integrated in physical form. For example, Fort Worth, Texas is a twin of Dallas, Texas because though Fort Worth is somewhat smaller, it is proportionally close enough and physically integrated enough ...
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