PASADENA, CALIFORNIA, Aug 4:
By the time the robotic Mars laboratory dubbed Curiosity streaks into the thin Martian atmosphere at hypersonic speed on Sunday night, the spacecraft will be in charge of its own seven-minute final approach to the surface of the Red Planet. With a 14-minute delay in the time it takes for radio waves from Earth to reach Mars 154 million miles (248 million km) away, NASA engineers will already have given Curiosity the last commands of its eight-month voyage through space. (agencies)
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