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Orbital mechanics

Tidal Evolution

The slow change of orbits and rotations caused by tidal friction. It is why the Moon is receding from the Earth and the day is lengthening, and why close-in moons and planets end up rotating in step with their orbits.

Across celestial mechanics

Knowledge connections

Sources

The primary and reference sources this topic draws on.

  • NASA JPLJet Propulsion Laboratory / Solar System Dynamics

    Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.