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Comets and the Origin of Life: Structure of Comets Nuclei and Dust

Published online by Cambridge University Press:  19 September 2017

A. Chantal Levasseur-Regourd  and
Emmanuel Desvoivres
A. Chantal Levasseur-Regourd
Affiliation:
Université Paris VI/Aéronomie, BP 3, F-91371 Verrières, France
Emmanuel Desvoivres
Affiliation:
Laboratoire de Planétologie de Grenoble, BP 53, F-38041, Grenoble, France

Abstract

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From observations of fragmentation events, clues to a gravitational aggregates structure of some comets nuclei are given. From in-situ and remote light scattering observations, a very high porosity is estimated for dust in comae. These results suggest a possible survival of cometary organics during atmospheric entry at the epoch of intense bombardment. In the coming years, new missions to comets and laboratory measurements on the ISS, will be used to assess such a scenario.

Type
Origins and Evolution of Life
Information
Symposium - International Astronomical Union , Volume 213: Bioastronomy 2002: Life Among the stars , 2004 , pp. 271 - 274
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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