Orbital mechanics

The Hill Sphere

The region around a body within which its own gravity dominates over that of the more massive body it orbits. It sets how far out moons and rings can stably orbit a planet — anything beyond a planet's Hill sphere is pulled away by the Sun.

Earth
The Roche Limit

Knowledge connections

Associated withEarth
Associated withThe Roche Limit
Associated withHill Sphere Radius

Sources

Facts on this topic will be cited from these primary and reference sources.

NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.

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The Hill Sphere

Bodies, frames & concepts

Knowledge connections

Sources

The Hill Sphere

Bodies, frames & concepts

Knowledge connections

Sources