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The search for other planets: Clues from the solar systemStudies of element abundances and values of D/H in the atmospheres of the outer planets and Titan support a two-step model for the formation of these bodies. This model suggests that the dimensions of Uranus provide a good index for the sensitivity required to detect planets around other stars. The high proportion of N2 on the surfaces of Pluto and Triton indicates that this gas was the dominant reservoir of nitrogen in the early solar nebula. It should also be abundant on pristine comets. There is evidence that some of these comets may well have brought a large store of volatiles to the inner planets, while others were falling into the sun. In other systems, icy planetesimals falling into stars should reveal themselves through high values of D/H.
Document ID
19950031674
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Owen, T.
(Institue for Astronomy, Honolulu, HI US, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1994
Publication Information
Publication: Astrophysics and Space Science
Volume: 212
ISSN: 0004-640X
Subject Category
Astronomy
Accession Number
95A63273
Funding Number(s)
CONTRACT_GRANT: NAGW-2650
CONTRACT_GRANT: NAGW-2631
Distribution Limits
Public
Copyright
Other

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