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Sputnik |
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Sputnik: see satellite, artificial satellite, artificial, object constructed by humans and placed in orbit around the earth or other celestial body (see also space probe). The satellite is lifted from the earth's surface by a rocket and, once placed in orbit, maintains its motion without further
..... Click the link for more information. ; space exploration space exploration, the investigation of physical conditions in space and on stars, planets, and other celestial bodies through the use of artificial satellites (spacecraft that orbit the earth), space probes (spacecraft that pass through the solar system and that may ..... Click the link for more information. . SputnikAny of a series of Earth-orbiting spacecraft whose launching by the Soviet Union inaugurated the space age. Sputnik 1, the world’s first artificial satellite (October 1957), remained in orbit until early 1958, when it reentered Earth’s atmosphere and burned up. Sputnik 2 carried a dog, Laika, the first living creature to orbit Earth; since Sputnik 2 was not designed to sustain life, Laika did not survive the flight. Eight more missions with similar satellites carried out experiments on various animals to test life-support systems and reentry procedures and to furnish data on space temperatures, pressures, particles, radiation, and magnetic fields. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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