Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1573d&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 39, Nov. 1991, p. 1573-1590.
Astronomy and Astrophysics
Astronomy
7
Imaging Techniques, Meteoroid Dust Clouds, Pioneer 11 Space Probe, Solar System, Zodiacal Light, Astronomical Polarimetry, Cassini Mission, Comet Nuclei, Galileo Project, Telescopes
Scientific paper
Experimental results from the three dust experiments on the Pioneer 11 and 12 spacecraft are used here to define the distribution and structural characteristics of what is believed to be the dominant population of meteoroids in the inner solar system. No two experiments agreed on the dust distribution and only the Imaging Photopolarimeter experiment could be fitted to the prevailing model of dust spiraling inward from the asteroid belt. Meteoroid Detection Experiment data showed a nearly constant flux from 1 to 18 AU. Reexamination of Asteoroid/Meteoroid Experiment or 'Sisyphus' data shows that the instrument measured a population of long-period meteoroids called cosmoids, composed mainly of water which dominates the dust distribution. Once the prevailing short period dust model is discounted, the results from the three instruments are shown to agree.
Dubin Maurice
Soberman Robert K.
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