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	Drake equation - Wikipedia, the free encyclopedia
		The Drake equation (also known as the Green Bank equation or the Sagan equation) is a famous result in the speculative fields of xenobiology, astrosociobiology and the search for extraterrestrial intelligence.
		The main purpose of the equation is to allow scientists to quantify the uncertainty of the factors which determine the number of extraterrestrial civilizations.
		In Sagan's case, the Drake equation was a strong motivating factor for his interest in environmental issues and his efforts to warn against the dangers of nuclear warfare.
	en.wikipedia.org /wiki/Drake_equation (1859 words)

	Drake equation
		The Drake equation (also known as the Green Bank equation) is a famous result in the speculative fields of xenobiology and the search for extraterrestrial intelligence.
		This equation was devised by Dr. Frank Drake in the 1960s in an attempt to estimate the number of extraterrestrial civilizations in our galaxy with which we might come in contact.
		In Sagan's case, the Drake equation has been a strong motivating factor for his interest in environmental issues and his efforts to warn against the dangers of nuclear warfare.
	www.nebulasearch.com /encyclopedia/article/Drake_equation.html (1237 words)

	Drake Equation
		A formula devised by Frank Drake and used as a focal point for discussion at the Green Bank conference in November 1961.
		Despite the enormous uncertainties involved in using the Drake Equation, which can result in a value of N from less than one to more than a billion, it is at least interesting and instructive to consider each of the factors involved.
		When this issue was raised at the Green Bank conference, John Lilly's claim that intelligence has arisen not once, but twice on this planet (see dolphins, as a form of alien intelligence), encouraged the attendees to adopt a value for f
	www.daviddarling.info /encyclopedia/D/DrakeEq.html (1982 words)

	eSky: Drake Equation
		An equation devised by astronomer and SETI researcher Frank Drake to estimate the number of civilizations in our Galaxy that might be detectable across interstellar distances.
		The equation was originally formulated for use in a SETI programme designed to detect interstellar radio signals, and assumes that any civilizations that programme might detect must be using radio themselves.
		The equation brings us close to certainty on one point, though: we can be confident that Earth is not the only living planet.
	www.glyphweb.com /esky/concepts/drakeequation.html (2655 words)

	Mister Green
		Green on Saturday night to meet up with an old friend, and went to the White Sox game today with a motley crew including the always-dangerous Blackfive.
		Green called and canceled both credit cards that were in there, my video store cards, and my library card.
		Green is married to a wonderful woman who most objective observers think must be insane, given their continuing marriage.
	www.mrgreen.blogspot.com (4837 words)

	Drake Equation (Site not responding. Last check: 2007-10-25)
		He came up with an equation to calculate the possibility of extra terrestrial civilizations; which became known as the ‘Drake Equation’.
		Drake writes, 'The basic premise behind the equation is that what happened here will happen with a large fraction of the stars as they are created, one after another, in the Milky Way galaxy and other galaxies.
		People unfamiliar with the accepted pictures of cosmic and biological evolution might think the equation is highly speculative; in fact, it is just the opposite, since the phenomena it assumes to take place in the Universe are only those we are sure have taken place at least once' ('The Drake Equation: A Reappraisal', pp.
	aliens.monstrous.com /drake_equation.htm (1267 words)

	extraterrestrials the greys
		The Drake Equation is a well-known result in the fields of xenobiology, astrosociobiology and the search for extraterrestrial intelligence.
		Also known as the Green Bank equation or Sagan equation, it was developed by Dr. Frank Drake in the 1960s during his effort in trying to estimate the possibility of the number of extraterrestrial civilizations we could come into contact with, within
		Famous astronomer Carl Sagan speculated that all the terms, with the exception of lifetime of a civilization are relatively high, and the factor influencing the existence of small or large numbers of civilizations is closely related to the civilization lifetime.
	www.dark-ufo.com /thedrakeequation.html (787 words)

	Are we alone in the Universe
		The solution was an equation, now known as the 'Drake equation' after Frank Drake the astronomer who proposed the core of the expression.
		Perhaps by far the most contentious issue of the entire equation is that of the lifetime of technically advanced extraterrestrial intelligence's within the galaxy.
		The Green Bank conference suggested that if technically advanced civilisations could avoid self annihilation then their lifetimes might be, by comparison to terrestrial geological time scales, very long indeed.
	www.homestead.com /cravikiran/files/alone.html (1458 words)

	The Drake Equation Revisited: Part I :: Astrobiology Magazine ::
		The Drake equation was developed as a means of predicting the likelihood of detecting other intelligent civilizations in our galaxy.
		At the NASA forum, Frank Drake, who formulated the equation 42 years ago, moderated a debate between paleontologist Peter Ward, co-author of the book Rare Earth, and astronomer David Grinspoon, author of the forthcoming book Lonely Planets: The Natural Philosophy of Alien Life.
		Drake is the director for the Center for the Study of Life in the Universe at the SETI Institute in Mountain View, CA.
	www.astrobio.net /news/article610.html (2122 words)

	The Drake Equation and Extraterrestrial Life, a Brief Overview (Site not responding. Last check: 2007-10-25)
		The Drake equation is introduced and some values for the established parameters suggested, a further parameter is proposed.
		The solution was an equation, now known as the Green Bank equation, though also widely referred to as the 'Drake equation' after Frank Drake the astronomer who proposed the core of the expression.
		Although the object of the original equation was to determine the number of technically advanced extraterrestrial civilisations, the debate has been centred on the search and eventual communication.
	global-conspiracies.com /drake_equation_and_extraterrestrial_life.htm (4947 words)

	astronomy4u.net
		While pessimists tend to say that SETI is a vaste of time, optimists believe that the universe is teeming with life and that the detection of an artifical ETI signal from outer space is only a question of time.
		The Drake or Green Bank equation, as it has come to be known, is the attempt to estimate the number of communicative civilizations in our galaxy and so also the attempt to define the chances of detecting other technologies.
		In the most optimistic case, the Drake equation is reduced to N = L, the lifetime of technological civilizations and the last term in the equation.
	www.astronomy4u.net /Seti/chances.htm (992 words)

	What Is The Drake Equation? (Site not responding. Last check: 2007-10-25)
		The Drake Equation, as it came to be known, was formulated in 1961 and is generally accepted by the scientific community.
		The famous Drake Equation, which proports to estimate the number of communicative civilizations in the Galaxy, was actually the agenda for the world's first SETI meeting in 1961.
		This plaque now graces the very wall of the room at NRAO Green Bank, WV which once held the flboard on which the equation was first written.
	www.setileague.org /general/drake.htm (256 words)

	SPACE.com -- The Drake Equation to estimate intelligent extraterrestrial life
		The Drake equation is an attempt to estimate the number of technological civilizations that might exist in our galaxy.
		The Drake equation, as it has come to be known, was first presented by Drake in 1961.
		Although there is no unique solution to this equation, it is a generally accepted tool used by the scientific community to examine these factors.
	www.space.com /searchforlife/seti_drake_equation.html (439 words)

	Bank Technology News \| Nonbank Payments: Are Banks Green? Yes And No.
		While the encroachment of new players into the once bank-dominated payments space has bankers green with envy-think Discover's card deal with Wal-Mart, to be issued by GE Consumer Finance-it doesn't exactly have them sprouting with new ideas.
		Payments are responsible for up to 40 percent of all banking income, giving this fight a fair amount of urgency.
		At this rate, banks better get moving, or what they lose in the payments business may be gone for good.
	www.banktechnews.com /article.html?id=20050502SMYALCYL (430 words)

	Green Bank conference
		An informal, private gathering convened by the Space Science Board, at Green Bank in November 1961, on the subject of "Intelligent Extraterrestrial Life." Following the publication of Cocconi and Morrison's seminal paper on SETI and Drake's pioneering Project Ozma, the aim was, in the words of the conference organizer J. Pearman:
		In addition to Pearman, the attendees were Dana Atchley, Melvin Calvin, Giuseppe Cocconi, Frank Drake, Su-Shu Huang, John Lilly, Philip Morrison, Bernard Oliver, Carl Sagan, and Otto Struve.
		Drake presented the now-famous Drake Equation in an effort to formulate mathematically the conference's central problem.
	www.daviddarling.info /encyclopedia/G/GreenBankconf.html (248 words)

	page52 - Extraterrestrial Life (Site not responding. Last check: 2007-10-25)
		The Green Bank equation, devised by United States astrophysicist F.D. Drake, represents an attempt to estimate the number of technically advanced civilisations in the Milky Way galaxy.
		Depending on how estimates for various terms in the equation are made, the number of advanced civilisations in the Milky Way is estimated at from 1 to 1,000,000.
		The most elaborate use of an unmanned space probe to investigate a neighbouring planet involved the United States Viking 1 and 2 probes that were launched in 1975.
	www.users.globalnet.co.uk /~hex/ufo/text/pages051-075/page52.html (332 words)

	EairlyWork
		It has nothing to do with the Green Bank Equation except that the GBE has 7 terms.
		This is just messing with the Mandelbrot equation and using some Macintosh ToolBox® calls to merge two images together in code.
		These are a combination of 5th and 7th degree polynomials jammed together in an artsy fartsy fashion.
	www.users.nwark.com /~alychne/MathArtMix/EarlyWorks/EairlyWorks.html (447 words)

	Wikinfo \| Drake equation (Site not responding. Last check: 2007-10-25)
		N is the number of extraterrestrial civilizations in our galaxy with which we might expect to be able to communicate
		The remarkable thing about the Drake equation is that by plugging in apparently fairly plausible values for each of the parameters above, the resultant expectant value of N is generally often >> 1.
		Images, some of which are used under the doctrine of Fair use or used with permission, may not be available.
	www.wikinfo.org /wiki.php?title=Drake_equation (1443 words)

	RedOrbit - Reference Library
		Drake Equation -- The Drake equation (also known as the Green Bank equation) is a famous result in the speculative fields of xenobiology and the search for extraterrestrial intelligence.
		The Drake equation is closely related to the Fermi paradox (for which, see below).
		Estimates of the Drake equation parameters This section attempts to list best current estimates for the parameters of the Drake equation.
	www.redorbit.com /education/reference_library?article_id=189 (1389 words)

	UFO Evidence : The Drake Equation
		While working as a radio astronomer at the National Radio Astronomy Observatory in Green Bank, West Virginia, Dr. Frank Drake (now Chairman of the Board of Trustees of the SETI Institute) conceived an approach to bound the terms involved in estimating the number of technological civilizations that may exist in our galaxy.
		The Drake Equation, as it has come to be known, was first presented by Drake in 1961 and identifies specific factors thought to play a role in the development of such civilizations.
		In 1961 the Drake Equation put the search for alien civilizations on a scientific footing and launched the modern SETI movement.
	www.ufoevidence.org /topics/DrakeEquation.htm (235 words)

	We Are Not Alone
		The "Green Bank Equation" (from 1956) formulates that there is a 1 to 1 million chance of intelligent life forms within our one, Milky Way galaxy.
		There are yet over 250 million known galaxy's (possibly twice that count from the Hubble) within our known universe, with each galaxy having: billions of stars.
		That would then be equated into (considering the 250 million other galaxies with their billions of stars) 1 billion to 100 billion possible intelligent life forms within our known universe.
	www.jasonleigh.org /sos5.htm (680 words)

	Bath Royal Literary and Scientific Institution Proceedings vol.8
		Maxwell’s equations derive a law of electrical induction in which the force due to an accelerating charge is
		In addition, Maxwell’s equations led to the concept of electromagnetic waves – one might surmise that a law of gravitational induction implies the existence of gravitational waves, travelling at the same speed as light does!
		Similarly, at three times the distance the effect of a single unit of mass is a third, there is nine times as much matter that is accelerating so the total effect is trebled.
	www.brlsi.org /proceed04/astronomy200401.htm (1287 words)

	The Search for Extraterrestrial Intelligence (Site not responding. Last check: 2007-10-25)
		The world's first SETI meeting was convened at Green Bank by Drake in 1961.
		Drake drafted an equation for estimating the number of possible communicative technologies in the cosmos, as the agenda for that conference.
		Today Drake's Equation is the primary mathematical tool with which SETI scientists assess their prospects of success.
	www.kosmoi.com /Science/Astronomy/SETI (1526 words)

	Beyond the Drake Equation (Site not responding. Last check: 2007-10-25)
		For a wide range of numbers that are considered reasonable by researchers in relevant fields, this equation yields results that are larger than one, implying that we should already be under surveillance, and that we should have already been visited.
		But it is important to recognize that this equation may greatly underestimate the actual numbers, because it does not take into account the possibility that some explorer civilizations might begin to multiply exponentially when they reach a certain age...
		Obviously, it is possible to write modified versions of the equations we are already using to explore these questions, but the parameters within these equations are much more uncertain than the highly uncertain parameters we have already considered.
	www.station1.net /DouglasJones/drake.htm (8992 words)

	Fermi Paradox (Site not responding. Last check: 2007-10-25)
		Out of the blue Fermi asked "Don't you ever wonder where everybody is?" York recalls that everyone knew that he meant extraterrestrials.
		In typical fashion Fermi then proceeded to answer his own question, in this case by running through what we now call the Drake Equation (or Green Bank Equation).
		He pointed to multiple star systems as evidence of planetary systems, and he talked about the probability of life arising and acquiring technology.
	frank.harvard.edu /~paulh/unpublished/fermi.htm (574 words)

	UFO Folklore Center (Site not responding. Last check: 2007-10-25)
		Harvard and went to the Green Bank, West Virginia facility of
		Equation (also known as the Green Bank Equation), the number of
		Phillip Morrison said that the Drake Equation was perhaps the
	www.qtm.net /~geibdan/a2000/sep/et.htm (1013 words)

	[32.05] A Globular Cluster Pulsar Renaissance with the Green Bank Telescope (Site not responding. Last check: 2007-10-25)
		[32.05] A Globular Cluster Pulsar Renaissance with the Green Bank Telescope
		Over the past two years, our team has used the Green Bank Telescope to uncover over 50 new recycled pulsars in the Milky Way globular cluster system, almost doubling the previous number known in the process.
		The most spectacular example is the rich bulge cluster Terzan 5, which now has at least 32 known pulsars, by far the most of any globular cluster.
	www.aas.org /publications/baas/v37n4/aas207/1983.htm (240 words)

	Drake equation - Facts, Information, and Encyclopedia Reference article
		Drake equation - Facts, Information, and Encyclopedia Reference article
		2 Current estimates of the Drake equation parameters
		The E.T. Equation, Recalculated - Frank Drake, December 2004
	www.startsurfing.com /encyclopedia/d/r/a/Drake_equation.html (1507 words)

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