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Nature and History of the Organic Compounds in Comets: An Astrophysical View

  • A. H. Delsemme
Chapter
Part of the Astrophysics and Space Science Library book series (ASSL, volume 167)

Abstract

The chemical similarities between comets, carbonaceous chondrites, and interstellar molecules and grains are reviewed first. The evolution of frosty interstellar grains is then followed during the collapse of a molecular cloud fragment and the subsequent formation of the Solar System. The paradigm clarifies the probable origin of the two populations of comets of different symmetry (the Oort Cloud and the Kuiper Belt) and implies an exogenous origin for all carbon and water on Earth. This origin is explained by the orbital diffusion of planetesimals that is required by the growth of protoplanets.

Keywords

Accretion Disk Molecular Cloud Terrestrial Planet Solar Nebula Carbonaceous Chondrite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer Science+Business Media Dordrecht 1991

Authors and Affiliations

  • A. H. Delsemme
    • 1
  1. 1.Department of Physics and AstronomyThe University of ToledoToledoUSA

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