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marcus
May19-04, 07:43 PM
just out:

http://arxiv.org/astro-ph/0405372

two guys at princeton, one in astrophysics and the other in
computational mathematics

based on isotope abundances and other evidence
they describe a scenario, what a mythical observer on the earth
would have seen
(a Mars-size impactor collects at Lagrange point, then gets loose and falls toward earth)

over 60 pages
and two dozen diagrams of orbits and stuff
very dull and tedious
but they answer the question