- 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.
Definition
[ n.]