Abstract
In any statement concerning extraterrestrial life one has to present the best amount of information concerning life as we know it here on earth. One way to do this is to put many classes of known objects in the universe on common plots. I call these plots the “Universal Diagrams”. The quantities plotted are mass, luminous output, temperature, size and entropy change. It is interesting to speculate where etraterrestrial life may lie on these diagrams but it seems that it will have to lie in regions more or less occupied by terrestrial life.
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© 1985 International Astronomical Union
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Kafatos, M. (1985). The Universal Diagrams and Life in the Universe. In: Papagiannis, M.D. (eds) The Search for Extraterrestrial Life: Recent Developments. International Astronomical Union, vol 112. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5462-5_33
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DOI: https://doi.org/10.1007/978-94-009-5462-5_33
Publisher Name: Springer, Dordrecht
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