Making the moon from a big splash

Details Making the moon from a big splash Making the moon from a big splash

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984sci...226.1060k&link_type=abstract

Science (ISSN 0036-8075), vol. 226, Nov. 30, 1984, p. 1060, 1061.

Astronomy and Astrophysics

Astronomy

4

Astronomical Models, Earth-Moon System, Impact Damage, Lunar Evolution, Ejecta, Gravitational Effects, Protoplanets

Scientific paper

A review is given of a number of ideas supporting the large-impact hypothesis of lunar formation as developed at the Conference on the Origin of the Moon (held in Hawaii, October 13-16, 1984). According to this hypothesis (first formulated by Hartmann and Davis in 1975), a huge planetesimal (possibly as large as Mars) smashed into the young earth, with the material that splashed into orbit forming the moon. Preliminary calculations in support of the large-impact model encountered no major objections from geochemists or dynamicists, though it was agreed at the conference that this hypothesis probably owes its popularity as much to its newness as to a strong underpinning of fact. Objections raised to the classic theories of lunar formation are also summarized.

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