The Chaotic Obliquity of Mars

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Science  26 Feb 1993:
Vol. 259, Issue 5099, pp. 1294-1297
DOI: 10.1126/science.259.5099.1294


Numerical integration of the rotation of Mars shows that the obliquity of Mars undergoes large chaotic variations. These variations occur as the system evolves in the chaotic zone associated with a secular spin-orbit resonance.