A point at which a particle would experience no net gravitational force. A neutral point exists between two static massive bodies. Its position depends on the bodies' separation and their masses, being closer to the more massive body. If the bodies are orbiting each other, as in reality, the problem is more complicated, and there exist five points (the Lagrangian points) at which the total acceleration due to gravitational and centrifugal forces is zero.
Subjects: Astronomy and Astrophysics.