Computer Science
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stin...8624609m&link_type=abstract
Presented at the Conference on the Galaxy and the Solar System, Tucson, Ariz., 10 Jan. 1985
Computer Science
Binary Stars, Cratering, Evolution (Development), Extinction, Images, Impact, Nemesis (Star), Earth (Planet), Geochronology, Planetary Evolution, Statistical Analysis
Scientific paper
The evidence that the Sun has a companion star Nemesis responsible for periodic mass extinctions is reviewed. A gaussian ideogram of the rates of family extinctions in the oceans shows periods of 26 and 30 Myr. Analysis of impact cratering on the earth shows a period of either 28.4 or 30 Myr, depending on the crater selection. Models which attempt to explain these periods with either oscillations through the galactic plane, or through the effects of a tenth planet, are seriously flawed. If the periods seen in the data are real (and not a spurious result of a statistical fluctuation) then the Nemesis hypothesis is the only suggested explanation that has survived close scrutiny. The Nemesis model predicts that the impacts took place during brief storms of several million years duration, perhaps accounting for the extended nature of the mass extinctions. A search for Nemesis is under way at Berkeley.
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