How many planets for man and aliens?

Part of the Springer Praxis Books book series (PRAXIS)


Let us now change topics completely! Rather than looking for ETs in the Galaxy, we now seek habitable planets for man in the Galaxy. How many are there and how far from us is the nearest such habitable planet?


Distance Distribution Civilization Distance Rand Corporation Uniform Random Variable Input Random Variable 
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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  1. 1.
    Gregory Benford Jim Benford, and Dominic Benford, “Cost optimized interstellar beacons: SETI,” website, October 22, 2008.Google Scholar
  2. 2.
    Jeffrey Bennet and Seth Shostak, Life in the Universe, Second Edition, Pearson/Addison Wesley, San Francisco, 2007, see p. 404 in particular.Google Scholar
  3. 3.
    Carl Sagan, Cosmos, Random House, New York, 1983, see pp. 298–302 in particular.Google Scholar
  4. 4.
    Claudio Maccone, “The statistical Drake equation,” paper #IAC-08-A4.1.4 presented on October 1, 2008, at the 59th International Astronautical Congress (IAC) held in Glasgow, Scotland, U.K., September 29–October 3, 2008.Google Scholar
  5. 5.
    Claudio Maccone, “The statistical Drake equation,” in press, Acta Astronautica, 2010, in the Proceedings of the First IAA Symposium on “Searching for Life Signatures” held at UNESCO, Paris, September 22–26, 2008.Google Scholar
  6. 6.
    Stephen H. Dole, Habitable Planets for Man, First Edition, 1964, RAND Corporation, see p. 82 in particular (i.e., the beginning of Chapter 5, “Probability of occurrence of habitable planets”).Google Scholar
  7. 7.
    Claudio Maccone, “SETI and SEH (Statistical Equation for Habitables),” paper #IAC- 09.A4.1.7 presented at the 60th International Astronautical Congress held at Daejeon, Republic of Korea, October 12–16, 2009. Later, this paper was published in Acta Astronautica, 68(2011), 63–75.Google Scholar
  8. 8.
    Stephen H. Dole, Habitable Planets for Man, First Edition published in 1964 (downloadable free today from the website of the Rand Corporation).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.International Academy of Astronautics and Istituto Nazionale di AstrofisicaTorino (Turin)Italy

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