May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981lastr..95..221f&link_type=abstract
L'Astronomie, vol. 95, May 1981, p. 221-230. In French.
Other
Comets, Evolution (Development), Solar Orbits, Solar System, Halley'S Comet, Oort Cloud, Orbit Perturbation, Protoplanets
Scientific paper
Problems related to the origin and orbital evolution of comets are discussed. A distinction is made between the orbits of short-period comets, which are generally situated within the orbit of Jupiter near the plane of the ecliptic, and of long-period comets, which are distributed uniformly in all directions. The case of Halley's comet is noted as an example of a rare intermediate-period comet with a retrograde orbit and period of 76 years. Considerations of the relatively short active lifetimes of comets lead to the proposition that a permanent mechanism must exist as a continuous source of cometary material from an enormous reservoir. The Oort cloud, a collection of several hundred billion comets thought to lie well outside the planetary system, is introduced as such a reservior, and a comparison of the initial and future orbital energies of 111 long-period comets is presented which reflects the difference between old comets, which have previously passed through the solar system, and new comets, which were injected into the solar system under the influence of another star. The capture of long-period comets into short-period orbits is explained in terms of orbital perturbations by close encounters with Jupiter. Finally, the theories of the ejection of planetesimals during the formation of the giant planets and of the accretion of bodies on the edge of the solar nebula are presented to account for the origin of the Oort cloud.
Froeschlé Ch.
Rickman Hans
No associations
LandOfFree
The origin of comets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The origin of comets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The origin of comets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1442250