On the evolution of the lunar orbit

Details On the evolution of the lunar orbit On the evolution of the lunar orbit

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...30..254t&link_type=abstract

Icarus, vol. 30, Feb. 1977, p. 254-266.

Astronomy and Astrophysics

Astronomy

7

Earth Rotation, Earth-Moon System, Lunar Evolution, Lunar Orbits, Orbital Mechanics, Tides, Abiogenesis, Earth Tides, Energy Dissipation, Lunar Tides, Moments Of Inertia, Precambrian Period, Radial Velocity, Volcanology

Scientific paper

It is generally accepted that the earth-moon separation is at present increasing due to tidal dissipation. Values for the corresponding lunar deceleration and the related slowing of the earth's rotation are obtained from astronomical observations and studies of ancient eclipses. Extrapolation of these values leads to a close approach of the earth and moon 1-3 b.y. BP. Periodicities in the Precambrian stromatolites may yield the number of solar days in a lunar month prior to 500 m.y. BP. These data combined with dynamic constraints on the number of solar days in a lunar month indicate a close approach of the earth and moon at 2.85 plus or minus 0.25 b.y. BP. Mare volcanism on the moon and high-temperature Archean volcanism on the earth prior to this date may be due to tidal heating. Strong tidal heating during a close approach could have contributed to the formation of the first living organisms.

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