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The best-known remote scanners are the Landsat series of satellites, which have mapped vegetation and geological formations on the earth's surface since 1972; the French SPOT series, first launched in 1986; Magellan, which used radar to map the planet Venus (1990); Lunar Prospector, which mapped the moon's surface composition and its magnetic and gravity fields (1998); Mars Global Surveyor, which engaged in a systematic mapping of Mars (1999); and Galileo, which returned pictures of Jupiter and its major moons (1995-2003).
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