Excitation of Lunar Eccentricity by Planetary Resonances

Details Excitation of Lunar Eccentricity by Planetary Resonances Excitation of Lunar Eccentricity by Planetary Resonances

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sci...318..244c&link_type=abstract

Science, Volume 318, Issue 5848, pp. 244- (2007).

Physics

4

Scientific paper

The origin of the Moon's nonnegligible orbital eccentricity of 0.053 has no theoretical explanation. Lunar laser ranging indicates that tides on Earth are currently increasing the Moon's eccentricity. However, ocean tides were likely much weaker during the first billion years, allowing lunar tides to damp any primordial lunar eccentricity very early on. During the tidally driven expansion of its orbit, the Moon must have been affected by two significant resonances related to Jupiter and Venus, passage through which may have generated today's lunar eccentricity.

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