ENGLISH

The Limits of Organic Life in Planetary Systems

By National Research Council , Committee on the Limits of Organic Life in Planetary Systems , Committee on the Origins and Evolution of Life

Book information

Publisher
National Academies Press
Year
2007
ISBN
9780309104845, 030910484X
Open Library ID
OL16136214M
Language
english
Format
PDF
Filesize
2 MB (1867987 bytes)
Edition
1
Pages
117\117
Library
mexmat
Time added
2009-11-09 02:42:13

Description

The search for life in the solar system and beyond has to date been governed by a model based on what we know about life on Earth (terran life). Most of NASA's mission planning is focused on locations where liquid water is possible and emphasizes searches for structures that resemble cells in terran organisms. It is possible, however, that life exists that is based on chemical reactions that do not involve carbon compounds, that occurs in solvents other than water, or that involves oxidation-reduction reactions without oxygen gas.To assist NASA incorporate this possibility in its efforts to search for life, the NRC was asked to carry out a study to evaluate whether nonstandard biochemistry might support life in solar system and conceivable extrasolar environments, and to define areas to guide research in this area. This book presents an exploration of a limited set of hypothetical chemistries of life, a review of current knowledge concerning key questions or hypotheses about nonterran life, and suggestions for future research.

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