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From outer space; Study of smallest 'dust' offers new challenge

Burnett, Donald S. (1984) From outer space; Study of smallest 'dust' offers new challenge. Geotimes, 29 (6). pp. 21-22. ISSN 0016-8556. https://resolver.caltech.edu/CaltechAUTHORS:20150427-073055962

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Abstract

The probability that an extraterrestrial object will be captured without vaporization is a complex function of encounter velocity, direction, meteoroid mass, density and strength, among other factors. However, there are two 'windows' that admit material mo re or less intact. Through the big window, objects roughly 10 cm in diameter or larger make it to Earth's surface as meteorites. The small window admits objects of about 1 to 10 microns in size, which escape total vaporization because they rapidly radiate the frictional energy associated with atmospheric entry. Also, the smaller objects have much less kinetic energy, and they therefore slow down higher above Earth, where the atmosphere is less dense.


Item Type:Article
Additional Information:© 1984 American Geological Institute.
Issue or Number:6
Record Number:CaltechAUTHORS:20150427-073055962
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150427-073055962
Official Citation:Burnett, D. S. (1984). From outer space; study of smallest "dust" offers new challenge. GeoTimes, 29(6), 21-22.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56986
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Apr 2015 15:44
Last Modified:03 Oct 2019 08:19

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