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The Oxford English Dictionary traces the concept of satellite states in English back as early as 1780. [4] In times of war or political tension, satellite states sometimes served as buffers between an enemy country and the nation exerting control over the satellites. [5]
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.
A satellite or an artificial satellite [a] is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting , navigation ( GPS ), broadcasting , scientific research, and Earth observation.
Qatar's first satellite flew as a joint project with the French corporation Eutelsat Qatar: Es'hail 1: Es'hailSat: SS/Loral: Ariane 5ECA: Kourou: 29 August 2013: Full ownership of the joint France-Qatar satellite Eutelsat 25B / Es'hail 1 was sold to Es'hailsat in 2018 [24] Peru: PUCP-Sat 1: Dnepr: Dombarovsky: 21 November 2013: Pocket-PUCP ...
True color image of the Earth from space. This image is a composite image collected over 16 days by the MODIS sensor on NASA’s Terra satellite. NASA Earth science satellite fleet as of September 2020, planned through 2023. Earth observation satellite missions developed by the ESA as of 2019.
The country’s X-ray Polarimeter Satellite, launched on Monday aboard Isro’s PSLV rocket, makes it only the second nation to study black holes and other celestial objects using an orbiting ...
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 ...
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