Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 12
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Miller, James D. and Felton, D. 2016. The Fermi Paradox, Bayes’ Rule, and Existential Risk Management. Futures,


    Maccone, Claudio 2014. Evolution and History in a new “Mathematical SETI” model. Acta Astronautica, Vol. 93, p. 317.


    Maccone, Claudio 2014. SETI as a part of Big History. Acta Astronautica, Vol. 101, p. 67.


    Makukov, Maxim A. and shCherbak, Vladimir I. 2014. Space ethics to test directed panspermia. Life Sciences in Space Research, Vol. 3, p. 10.


    Maccone, Claudio 2013. SETI, Evolution and Human History Merged into a Mathematical Model. International Journal of Astrobiology, Vol. 12, Issue. 03, p. 218.


    Glade, Nicolas Ballet, Pascal and Bastien, Olivier 2012. A stochastic process approach of the drake equation parameters. International Journal of Astrobiology, Vol. 11, Issue. 02, p. 103.


    Vukotić, Branislav and Ćirković, Milan M. 2012. Astrobiological Complexity with Probabilistic Cellular Automata. Origins of Life and Evolution of Biospheres, Vol. 42, Issue. 4, p. 347.


    Maccone, Claudio 2011. A Mathematical Model for Evolution and SETI. Origins of Life and Evolution of Biospheres, Vol. 41, Issue. 6, p. 609.


    McCabe, Michael and Lucas, Holly 2010. On the origin and evolution of life in the Galaxy. International Journal of Astrobiology, Vol. 9, Issue. 04, p. 217.


    Burchell, Mark 2009. Life: what is the chance that we are alone?. Significance, Vol. 6, Issue. 3, p. 142.


    Burchell, Mark and Dartnell, Lewis 2009. Astrobiology in the UK. Astronomy & Geophysics, Vol. 50, Issue. 4, p. 4.27.


    Smith, Reginald D. 2009. Broadcasting but not receiving: density dependence considerations for SETI signals. International Journal of Astrobiology, Vol. 8, Issue. 02, p. 101.


    ×
  • International Journal of Astrobiology, Volume 5, Issue 3
  • July 2006, pp. 243-250

W(h)ither the Drake equation?

  • Mark J. Burchell (a1)
  • DOI: http://dx.doi.org/10.1017/S1473550406003107
  • Published online: 19 September 2006
Abstract

For over 40 years the formalism known as the Drake equation has helped guide speculation about the likelihood of intelligent extraterrestrial life contacting us. Since the equation was formulated there have been significant advances in astronomy and astrophysics, sufficient to merit a review of the significance of the Drake equation. The equation itself is as a series of terms which, when combined, allow an informed discussion of the likelihood of contact with an alien intelligence. However, whilst it has a mathematical form (i.e. a series of terms multiplied together to give an overall probability) it is best understood not as an equation in the strictly mathematical sense. Some of the terms have a physically quantifiable, numerically based meaning (e.g. obtainable from astronomy) and some are more social in content in that they describe the behaviour and evolution of societies and thus are more social science in nature and not truly estimable without observation of a set of societies. Initially, almost all the terms had to be estimated based on informed guesswork or belief. However, in the intervening period since the early 1960s, many of the a priori scientific terms which were themselves initially so uncertain as to require estimation by guess work or belief are now, or will soon be, directly measurable from current or planned astronomical projects. This leaves the non-scientific terms as a distinct class of their own, still subject to analysis only by discussion. Thus observational astronomy has nearly caught up with parts of the Drake equation and will soon quantify the purely physical science parts of the equation. The social parts (concerning intelligent societies, etc.) are still a priori unknowable. In addition, the growth of the subject called astrobiology (i.e. the study of life in the Universe) has developed so fast that communicating with intelligent life is now increasingly seen as just one small part of a much larger discipline. The knowledge as to whether there is life per se (apart from on Earth) in our galactic neighbourhood may be obtainable in the near future directly from observation. Such knowledge will have a profound impact on mankind and will be obtained without the form of communication envisaged by the Drake equation.

Copyright
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

International Journal of Astrobiology
  • ISSN: 1473-5504
  • EISSN: 1475-3006
  • URL: /core/journals/international-journal-of-astrobiology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: