Comets and their evolution in the solar system

Details Comets and their evolution in the solar system Comets and their evolution in the solar system

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315..105l&link_type=abstract

In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 105-111 (SEE N91-18922 10-90)

Astronomy and Astrophysics

Astronomy

Chemical Analysis, Comet Nuclei, Comets, Interstellar Chemistry, Porosity, Stellar Evolution, Accretion Disks, Asteroid Belts, Comet Tails, Cosmic Dust, Infrared Astronomy Satellite

Scientific paper

In-situ and remote studies of comets are described. Results of these studies suggest that the chemical composition of cometary nuclei is similar to that of the interstellar medium. The crust of a comet nucleus is deemed to be dark and porous. The dust grains released in a coma are considered to be a mixture of submicron particles glued together by various polymers. Many different scenarios of cometary evolution are presented. Infrared observations of the IRAS (Infrared Astronomy Satellite) spacecraft confirm the heterogeneity of cometary trails and asteroidal bands.

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