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In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon. The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957. By 2010 thousands of satellites have been launched into orbit around the Earth. These originate from more than 50 countries and have used the satellite launching capabilities of ten nations. A few hundred satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Venus, Mars, Jupiter and Saturn. Satellites are used for a large number of purposes. Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit. Satellites are usually semi-independent computer-controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control. From Wikipedia under the
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466px x 540px | 34.70kB [source page] image source United Kingdom 1971 United Kingdom launched Satellite Prospero X 3 through Rocket Black Arrow and is the only Satellite launched through British rocket image source India 1980 From Yahoo Image Search: "Artificial satellites" Hunt is on for another planet Earth
Philadelphia Inquirer These lesser stars are being included thanks to the influence of Guinan and Andrej Prsa, a Villanova post-doctoral researcher who developed an artificial ... and more » My how things have changed
Greene County Daily World As a kid, I never heard of bottled water, FM radio, CDs, video games, electric typewriters, PCs, laptops, artificial hearts, the words "fat-free" on any ... and more » Geosemble, Fetch Collaborate on Hyperlocal Technologies
PR-USA.net (press release) For more information please visit www.geosemble.com Fetch Technologies is a leading provider of artificial intelligence-based Web Integration solutions. ... and more » From Google News Search: "Artificial satellites" GENERAL KNOWLEDGE Pt. II Travel around the world.
admin Fri, 03 Sep 2010 08:48:07 GM The process by which water becomes more nourished either by the natural process of maturation or . artificial. processes. what is a diamond made of? A 100 million tears ago, when the Earth was cooling carbon deposits were exposed to extreme . ... The communication . satellites. are normally geosynchronous. In other words, these . satellites. have the same period of revolution as that of the earth 24 hours. To attain this, the . satellite. is launched at an altitude of 36000 kms from ... From Google Blog Search: "Artificial satellites" |




