美国火星探测器寻找火星生命足迹

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LOS ANGELES, Aug. 12 -- A new spacecraft designed to search water on Mars was launched Friday by an Atlas rocket from the Kennedy Space Center, Florida, the US space agency NASA said.
         
        　　The two-ton spacecraft, named Mars Reconnaissance Orbiter, is scheduled to arrive at Mars in March 2006 for a mission to understand the planet's water riddles and advance the exploration of the mysterious red planet, said the NASA Jet Propulsion Laboratory in Pasadena, California.