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2016-10-31 10:37:09
It is not needed to speed the spacecraft to Pluto; that was done entirely by the launch vehicle, with a boost from Jupiter¡¯s gravity.
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The New Horizons propulsion system includes 16 small hydrazine-propellant thrusters mounted across the spacecraft in eight locations, a fuel tank, and associated distribution plumbing. Four thrusters that each provide 4.4 newtons of force (1 pound) are used mostly for course corrections. Operators also employ 12 smaller thrusters – providing 0.8 newtons (about 3 ounces) of thrust each – to point, spin up and spin down the spacecraft. Eight of the 16 thrusters aboard New Horizons are considered the primary set; the other eight comprise the backup (redundant) set.
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radioisotope thermoelectric generator (RTG) power source
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Ãâó : http://pluto.jhuapl.edu/Mission/Spacecraft/Systems-and-Components.php :
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