Halley's comet - Preliminary assessment of a program

Details Halley's comet - Preliminary assessment of a program Halley's comet - Preliminary assessment of a program

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987crasg...4..117e&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie Generale, La Vie des Sciences (ISSN 0762-0969), vol. 4, no. 2, Mar.-Apr. 19

Computer Science

Abundance, Comet Nuclei, Cometary Atmospheres, Cosmic Dust, Halley'S Comet, International Cooperation, Giotto Mission, Hydrocyanic Acid, Infrared Spectroscopy, Solar Wind, Space Probes, Vega Project

Scientific paper

Preliminary results of an international ground-based program investigating Halley's comet are discussed, adding to the present understanding of the nature of cometary nuclei, dust grains, and parent molecules. Results confirm the dirty 'snowball' model of Whipple (1950), but indicate that this snow is covered for the most part with carbon at an elevated temperature. The presence of a large quantity of small particles, and of particles composed of H, C, O, and N, together confirm the nature of the primeval cometary material. Similarities found between the cometary spectral signature at 3 microns and spectral signatures noted in the interstellar medium point to a possible analog between cometary processes and those occurring in the interstellar medium.

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