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Libration point

   Also found in: Wikipedia 0.17 sec.
Li`bra´tion point`    (lî`brā´shŭn point`)
n.1.any one of five points in the plane of a system of two large astronomical bodies orbiting each other, as the Earth-moon system, where the gravitational pull of the two bodies on an object are approximately equal, and in opposite directions. A solid object moving in the same velocity and direction as such a libration point will remain in gravitational equilibrium with the two bodies of the system and not fall toward either body.


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Another coronagraph is scheduled for an ESA/NASA craft called SOHO, to study solar pulsations and the acceleration of the solar wind from a position in space called the L-1 libration point, at which gravitational forces are balanced between the Earth and sun.
R.I.P. Solar Max: the satellite's last days by Eberhart, J. / Science News
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