Frequency of nearby supernovae and climatic and biological catastrophes

Details Frequency of nearby supernovae and climatic and biological catastrophes Frequency of nearby supernovae and climatic and biological catastrophes

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.265..318c&link_type=abstract

Nature, vol. 265, Jan. 27, 1977, p. 318, 319.

Mathematics

Logic

22

Catastrophe Theory, Climatology, Interstellar Matter, Supernovae, Astronomical Models, Ice Formation, Solar System

Scientific paper

Attention is given to a proposal made by McCrea (1975) that the encounter of the solar system with a dense cloud of interstellar material during its passage through a spiral arm of the Galaxy may produce such climatic catastrophes on earth as the ice epochs. Certain difficulties concerning McCrea's proposal in connection with the required cloud density are pointed out and an alternative hypothesis is presented. This hypothesis retains McCrea's association with the passage of the solar system through a spiral arm. However, the initiation of an ice epoch, plus biological catastrophes are related to an encounter of the solar system with a nearby supernova outburst rather than a superdense interstellar cloud.

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