A Lagrange point is an equilibrium of the circular restricted three-body problem in the frame rotating with the two massive bodies.
The three collinear Lagrange points lie on the line through the two massive bodies.
The Lagrange point lies beyond the more massive primary, on the side opposite the secondary.
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A Lagrange point is a position in space where the gravitational forces of two large bodies, such as a planet and a moon or a planet and the sun, balance out the centripetal force experienced by a smaller body. This results in a stable or semi-stable location where the smaller body can maintain a position relative to the two larger bodies, effectively "parking" in that location.