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Carl Edward Sagan
Carl Edward Sagan , 1934-96, American astronomer and popularizer of science, b. New York City. Early in his career he investigated radio emissions from Venus and concluded that the cause was a surface temperature of c.900°F (500°C) and crushing atmospheric pressure. He also studied color... Read more |
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Mars probes
Mars Exploration Rovers Background The Rovers The Mission Mission Results Resources Background The exploration of Mars using robotic spacecraft began in the 1960s, when the US National Aeronautic and Space Administration’s (NASA Read more |
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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 or may not orbit another... Read more |
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E.L. Doctorow
Edgar Laurence Doctorow E.L. Doctorow (born 1931) is widely regarded as one of America's pre-eminent novelists of the 20th Century. His work is philosophically probing, employing an adventurous prose style, and the use of historical and quasi-historical figures, situations, and settings.... Read more |
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atomic force microscope
atomic force microscope (AFM), device that uses a spring-mounted probe to image individual atoms on the surface of a material. Unlike the scanning tunneling microscope , which is also a scanning probe microscope, the AFM can be used on materials that do not conduct electricity. In the original... Read more |
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Lazzaro Spallanzani
SPALLANZANI, LAZZARO(b. Scandiano, Italy, 12 January 1729; d. Pavia, Italy, 11 February 799)natural history, experimental biology, physiology.Among the many dedicated natural philosophers of the eighteenth century, Spallanzani stands preeminent for applying bold and imaginative experimental methods... Read more |
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space probe
space probe space vehicle carrying sophisticated instrumentation but no crew, designed to explore various aspects of the solar system (see space exploration ). Unlike an artificial satellite , which is placed in more or less permanent orbit around the earth, a space probe is launched with... Read more |
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Richard Avedon
Richard Avedon The American fashion photographer Richard Avedon (born 1923) was best known for his probing portraits that go beyond recording likenesses to explore the identity of society and to reflect dreams and desires. Richard Avedon was born in New York City on May 15, 1923. Educated in... Read more |
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Clyde William Tombaugh
Clyde William Tombaugh , 1906-97, American astronomer, b. Streator, Ill. Although lacking formal training or a college degree, he was hired in 1929 as an assistant by the Lowell Observatory to continue the search for a planet beyond Neptune, which had been initiated by Percival Lowell . Tombaugh... Read more |
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Green light for plutonium Pluto probe.(News)
...to launch NASA's plutonium-powered Pluto probe Jan. 17...facing the New Horizons spacecraft...Colorado-built Lockheed Martin Atlas V rocket...electrical power comes from...radioisotope thermoelectric generator. Because...forwarded it to NASA ... |