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Astrophysics and Space Science

, Volume 50, Issue 1, pp 3–22 | Cite as

Some comments on the Oort cloud

  • M. E. Bailey
Article

Abstract

The arguments used by Lyttleton to prove the nonexistence of the Oort cloud are reviewed, and it is shown that Oort's hypothesis remains consistent with observation. The 1950 model of the cloud cannot be correct and, by use of the results from a number of more recent papers, an ‘improved’ model is described and compared with observations. It is emphasized that comparison of the predictions of theory with observations should concentrate on thea-distribution, as the 1/a-distribution masks much of the detailed structure of the theory. An order of magnitude argument is given which shows that ∼20% of so-called ‘new’ comets have passed through the planetary system before, and the implications of this to the statistics of near-parabolic comet orbits are briefly investigated.

Keywords

Detailed Structure Planetary System Oort Cloud Comet Orbit Magnitude Argument 
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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Copyright information

© D. Reidel Publishing Company 1977

Authors and Affiliations

  • M. E. Bailey
    • 1
  1. 1.Dept. of AstronomyUniversity of EdinburghScotland

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