Tim Thomason (talk | contribs) m (moved origin and explanation to background (not canon, equation was only seen in a poster)) |
Tim Thomason (talk | contribs) m (→Background: date) |
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The '''Drake equation''' was devised in an attempt to estimate the number of extraterrestrial [[alien]] species that could communicate with [[human]]s. The first and more mathematical variation stated: |
The '''Drake equation''' was devised in an attempt to estimate the number of extraterrestrial [[alien]] species that could communicate with [[human]]s. The first and more mathematical variation stated: |
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:<math>N = R^{*} ~ \times ~ f_{p} ~ \times ~ n_{e} ~ \times ~ f_{l} ~ \times ~ f_{i} ~ \times ~ f_{c} ~ \times ~ L</math> |
:<math>N = R^{*} ~ \times ~ f_{p} ~ \times ~ n_{e} ~ \times ~ f_{l} ~ \times ~ f_{i} ~ \times ~ f_{c} ~ \times ~ L</math> |
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The second variation stated: |
The second variation stated: |
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: <math>Ff^2 (MgE)-C^1 Ri^1 ~ \times ~ M=L/So</math> |
: <math>Ff^2 (MgE)-C^1 Ri^1 ~ \times ~ M=L/So</math> |
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In [[1996]], [[Rain Robinson]] had a poster of the two variations of the equation. ([[VOY]]: "[[Future's End, Part I]]") |
In [[1996]], [[Rain Robinson]] had a poster of the two variations of the equation. ([[VOY]]: "[[Future's End, Part I]]") |
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==Background== |
==Background== |
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− | The Drake Equation was devised by Dr. Frank Drake in |
+ | The Drake Equation was devised by Dr. Frank Drake in [[Early production history|1961]]. The meaning of the first equation is this: |
:where: |
:where: |
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Revision as of 00:43, 17 November 2005
The Drake equation was devised in an attempt to estimate the number of extraterrestrial alien species that could communicate with humans. The first and more mathematical variation stated:
The second variation stated:
In 1996, Rain Robinson had a poster of the two variations of the equation. (VOY: "Future's End, Part I")
Background
The Drake Equation was devised by Dr. Frank Drake in 1961. The meaning of the first equation is this:
- where:
- N is the number of extraterrestrial civilizations in our galaxy with which we might expect to be able to communicate
- and
- R* is the rate of star formation in our galaxy
- fp is the fraction of those stars which have planets
- ne is average number of planets which can potentially support life per star that has planets
- fl is the fraction of the above which actually go on to develop life
- fi is the fraction of the above which actually go on to develop intelligent life
- fc is the fraction of the above which are willing and able to communicate
- L is the expected lifetime of such a civilization
The Drake equation was used by Gene Roddenberry in 1964 in his pitch for Star Trek. He did not have a copy of the equation so he made up his own, which is the "second variation" from "Future's End."