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Galactic Colonization and Competition in a Young Galactic Disk

Published online by Cambridge University Press:  04 August 2017

Edwin L. Turner
Edwin L. Turner*
Affiliation:
Princeton University Observatory, Princeton, NJ 08544 USA

Abstract

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Even if long-lived advanced technical civilizations arise very frequently and interstellar colonization is possible and common among them, it is argued that this colonization process is unlikely to fully occupy the Galaxy (i.e., saturate it) due to interactions between the colonizing civilizations. This argument is supported by the analysis of population dynamics equations based upon those of theoretical ecology which are believed to be applicable to an extremely wide range of behavior patterns. It is also pointed out that recent astronomical evidence suggests that the disk of our Galaxy may be substantially younger than previously thought, thus making a non-saturated colonization model more plausible.

Information

Type
Section VII. The Fermi Paradox and Alternative Search Strategies
Information
Symposium - International Astronomical Union , Volume 112: The Search for Extraterrestrial Life: Recent Developments , 1985, pp. 477 - 482
Copyright
Copyright © Reidel 1985 

References

1) Shklovskii, I. S., and Sagan, C. 1966, Intelligent Life in the Universe, San Francisco: Holden-Day; Sagan, C. 1973, Icarus, 19, 350.Google Scholar
2) Hart, M. H. 1975, QJRAS, 16, 128; Jones, E. M. 1982, in Extraterrestrials: Where Are They? , eds. Hart, M. H. and Zuckerman, B., New York: Pergamon Press, 66; Newman, W. I., and Sagan, C. 1981, Icarus, 46, 293.Google Scholar
3) Hart, M. H. 1979, Icarus, 37, 351; Argyle, E. 1977, Orig. Life, 8, 287; Tipler, F. J. 1981, QJRAS, 22, 133; and see E. Jones in this volume.CrossRefGoogle Scholar
4) Drake, F. D. 1980, in Strategies for the Search for Life in the Universe, ed. Papagiannis, M. D., Boston: D. Reidel, 27; Oliver, B. M. 1980, ibid, 79; and see Drake, F. D. in this volume.CrossRefGoogle Scholar
5) May, R. M. 1981, in Theoretical Ecology: Principles and Applications, ed. May, R. M., Sunderland, Mass.: Sinauer, Chpt. 2; May, R. M. 1976, Nature, 261, 459.Google Scholar
6) Gilpin, M. E., and Diamond, J. M. 1982, Oecologia, 52, 75; Diamond, J. M., and May, R. M. 1981, in Theoretical Ecology: Principles and Applications , ed. May, R. M., Sunderland, Mass.: Sinauer, Chpt. 10; Diamond, J. M., and Karr, J. R. 1972, Ecology, 53, 330.Google Scholar
7) Swick, K. E. 1981, SIAM J. Appl. Math., 40, 266; and see Finney, B. R. in this volume.Google Scholar
8) Demarque, P., and McClure, R. D. 1977, in The Evolution of Galaxies and Stellar Populations, eds. Tinsley, B. M. and Larson, R. B., New Haven: Yale University Observatory, 199.Google Scholar
9) Liebert, J., Dahn, C. C., Gresham, M., and Strittmatter, P. A. 1979, ApJ, 233, 226.Google Scholar
10) de Vaucouleurs, G. 1981, Proc. N. Y. Acad. Sci., 375, 90; Aaronson, M., Mould, J., Huchra, J., Sullivan, J. T., Schommer, R. A., and Bothum, G. D. 1980, ApJ, 239, 12; Guth, A. H. 1984, Proc. N. Y. Acad. Sci., 422, 1.Google Scholar
11) Schramm, D. N. 1974, Ann. Rev. Ay. Astroph., 12, 383.CrossRefGoogle Scholar
12) Drake, F. D. 1976, Tech. Rev., 78, No. 7, 22; Oliver, B. M. (ed) 1973, Project Cyclops: A Design Study of a System for Detecting Extraterrestrial Intelligent Life, NASA CR114445, 29; Sagan, C. 1979, Broca's Brain, New York: Random House, 276.Google Scholar
13) Bracewell, R. 1982, in Extraterrestrials: Where Are They?, eds. Hart, M. H. and Zuckerman, B., New York: Pergamon, 34; Jones, E. M. 1981, Icarus, 46, 328; Hart, M. H. 1983, preprint of paper presented at Los Alamos Conference on Interstellar Migration.Google Scholar
14) Hotei 917, death poem as translated in Zen Poems of China and Japan: The Crane's Bill, trans. Stryk, L. and Ikemoto, T., New York: Grove (1973), 20.Google Scholar