Physics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...36..187m&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 36, Oct. 1986, p. 187-190.
Physics
3
Comets, Mass Distribution, Solar System, Albedo, Cometary Atmospheres, Giotto Mission, Halley'S Comet, Oort Cloud, Vega Project
Scientific paper
The assumption that the very low albedo determined for Halley's comet is typical of all short period comets, taken together with the assumption that the average sizes of long and short-period comets are approximately equal, leads to an increase in the total mass of comets in the solar system by almost two orders of magnitude. If gravitational ejection from the Uranus-Neptune zone during the later phases of planet formation is indeed responsible for the classical Oort cloud between 0.0001 and 0.00001 AU, then the mass of comets in this transplanetary region during cosmogonic times has to exceed the combined masses of Uranus and Neptune by over an order of magnitude. Furthermore, if the recent arguments for as many as 10 to the 14th comets in an 'inner' Oort cloud between about 40 and 10,000 AU are valid, then the total mass of comets in the solar system approaches 2 percent of a solar mass.
Marconi Max L.
Mendis Asoka D.
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