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Satellites Space Astronaut Souvenir Sheet Mint NH chess master Gambia Minnie Volunteer Whale CounterTogo Satellites Space Astronaut Souvenir Sheet Mint NH In the context of spaceflight, 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 such as Earth's Moon. In 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. Since then, about 8,100 satellites from more than 40 countries have been