# gravity gradient

The gravity gradient is the variation in the force of attraction between two bodies expressed as a function of the separation distance.

## Gravity gradient stabilization

Gravity gradient stabilization is a useful passive method to achieve stabilization of satellites by using the gravity gradient of the primary body. An orbiting spacecraft will tend to align its long axis (more precisely, the axis of minimum moment of inertia) with the local vertical – that is, in a radial direction.