Other
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977newsc..76...78h&link_type=abstract
New Scientist, vol. 76, Oct. 13, 1977, p. 78-80.
Other
Comet Nuclei, Meteoroid Showers, Micrometeoroids, Astronomical Models, Halley'S Comet, Meteor Trails, Meteoroid Concentration, Solar System
Scientific paper
Meteor streams are clouds of gas-rich dust particles which scatter slowly and have their origins in the nuclei of short-period comets. Model calculations have been proposed to follow the dispersion of three sizes of particles: naked-eye, radar, and satellite-detected meteoroids. The model is based on the assumption that a meteor stream is dispersed solely by the ejection velocity from the parent comet nucleus, although it is suggested that there are other influential factors, such as electrical and magnetic forces, asymmetrical absorption and re-emission of solar radiation, and perturbations by the planets. Historical records have pointed to the rapid demise of meteor streams, which eventually decay to form part of the zodiacal cloud. The Halley and Encke comets are identified as declining giant comets making up part of the current zodiacal cloud. Other significant concentrations of meteoroids include the Sungrazing comet family which is divided into two sub-groups. It is suggested that a conventional spacecraft launch vehicle may be used to study the meteor stream from these comets, yielding information about juvenile meteor streams.
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