Mathematics – Probability
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991airsp...6...88v&link_type=abstract
Air and Space (ISSN 0886-2257), vol. 6, Oct.-Nov. 1991, p. 88-94.
Mathematics
Probability
1
Asteroids, Earth Surface, Hypervelocity Impact, Meteorite Collisions, Meteorite Craters, Chemical Composition, Iridium, Mineralogy, Radar Data
Scientific paper
The paper discusses the record of past asteroid impacts on earth, and the probability of a future major collision with a large celestial body. One analytical theory suggests that the chance of a half-mile-wide object will strike earth in the next 100 years is one in 1000. Consideration is given to the KT boundary layer located between the Cretaceous and Tertiary periods where large amounts of iridium are found worldwide; this gave rise to the theory of a space body collision with earth that may have caused the extinction of the dinosaurs. A rule of thumb for calculating the energy of an asteroid striking the earth at a typical speed of 24,000 mph is given. Attention is given to the numerous asteroid strikes that have occurred and have been analyzed.
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