Stabilization of the Earth's obliquity by the Moon

@article{Laskar1993StabilizationOT,
  title={Stabilization of the Earth's obliquity by the Moon},
  author={Jacques Laskar and Fr{\'e}d{\'e}ric Joutel and Philippe Robutel},
  journal={Nature},
  year={1993},
  volume={361},
  pages={615-617}
}
ACCORDING to Milankovitch theory1,2, the ice ages are related to variations of insolation in northern latitudes resulting from changes in the Earth's orbital and orientation parameters (precession, eccentricity and obliquity). Here we investigate the stability of the Earth's orientation for all possible values of the initial obliquity, by integrating the equations of precession of the Earth. We find a large chaotic zone which extends from 60° to 90° in obliquity. In its present state, the Earth… 

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