Moo Pig Wisdom is a brilliant combination of Antiquity and Prequel Modern Flea Market. We respectfully ask you to mind your children while here.

Monday, January 16, 2012

Space: SETI: The Drake Equation --the Number of Communicating ET's

Retrieved by Pat Darnell | Jan 15, 2012 | Bryan TX

Space: SETI: The Drake Equation:
The Drake Equation was developed by Frank Drake in 1961 as a way to focus on the factors which determine how many intelligent, communicating civilizations there are in our galaxy. The Drake Equation is:

N = N* fp ne fl fi fc fL

N* represents the number of stars in the Milky Way Galaxy
  • Question: How many stars are in the Milky Way Galaxy?
  • Answer: Current estimates are 100 billion.

fp is the fraction of stars that have planets around them
  • Question: What percentage of stars have planetary systems?
  • Answer: Current estimates range from 20% to 50%.

ne is the number of planets per star that are capable of sustaining life
  • Question: For each star that does have a planetary system, how many planets are capable of sustaining life?
  • Answer: Current estimates range from 1 to 5.

fl is the fraction of planets in ne where life evolves
  • Question: On what percentage of the planets that are capable of sustaining life does life actually evolve?
  • Answer: Current estimates range from 100% (where life can evolve it will) down to close to 0%.

fi is the fraction of fl where intelligent life evolves
  • Question: On the planets where life does evolve, what percentage evolves intelligent life?
  • Answer: Estimates range from 100% (intelligence is such a survival advantage that it will certainly evolve) down to near 0%.

fc is the fraction of fi that communicate
  • Question: What percentage of intelligent races have the means and the desire to communicate?
  • Answer: 10% to 20%

fL is fraction of the planet's life during which the communicating civilizations live
  • Question: For each civilization that does communicate, for what fraction of the planet's life does the civilization survive?
  • Answer: This is the toughest of the questions. If we take Earth as an example, the expected lifetime of our Sun and the Earth is roughly 10 billion years. So far we've been communicating with radio waves for less than 100 years. How long will our civilization survive? Will we destroy ourselves in a few years like some predict or will we overcome our problems and survive for millennia? If we were destroyed tomorrow the answer to this question would be 1/100,000,000th. If we survive for 10,000 years the answer will be 1/1,000,000th.
When all of these variables are multiplied together when come up with: N, the number of communicating civilizations in the galaxy.

The real value of the Drake Equation is not in the answer itself, but the questions that are prompted when attempting to come up with an answer. Obviously there is a tremendous amount of guess work involved when filling in the variables. As we learn more from astronomy, biology, and other sciences, we'll be able to better estimate the answers to the above questions. Many of these questions will be addressed in depth in future issues of Enigma.
'via Blog this'

Frank Drake :: In 1963 Drake took a short-lived position at the Jet Propulsion Lab and later that year he took a position at Cornell's Center for Radiophysics and Space Research. Two years later he accepted the directorship of the Cornell run Arecibo Observatory in Puerto Rico. Drake and his family returned to Cornell in 1968.

No comments:

Blog Archive

SUNDAY :: bishop FM 105.9 Auckland


Gary Grainger LIVE BluesShow from Auckland, 6 to 8PM LondonTime .... you listen too.


: It is PROHIBITED by law to use our service or the information it provides to make decisions about consumer credit, employment, insurance, tenant screening, or for any other purpose subject to the Fair Credit Reporting Act, 15 USC 1681 et seq. MooPig Wisdom does not provide consumer reports and is not a consumer reporting agency. The information available on our website may not be 100% accurate, complete, or up to date, so do not use this information as a substitute for your own due diligence, especially if you have concerns about a person’s criminal history. MooPig Wisdom does not make any representation or warranty about the accuracy of the information available through our website or about the character or integrity of the person about whom you inquire. So dip your balls in turpentine and get rid of your own fleas before calling me out.

Ask Someone Who Cares -- SUCH AS SUCH MULCH

To report any abusive, obscene, defamatory, racist,
homophobic or threatening comments, or anything that may violate any applicable laws, please click
--ask_someone_who cares -- ASWC to report with pertinent details.

Anyone posting such material will be immediately mesquitte blackened over a very hot pit fire down at C and J's BBQ on Harvey-Elmo-Weedon Road, and permanently removed from all servers, its IP
owner will be locked in a small room with back issues of
The ECONOMIST, and one scratchy re-mix 8-track tape of Steely Dan's first album...
IP addresses might be recorded to aid us in enforcing these conditions, that is if we cared.

A Fantastically Flawed Script for a Jazz Rock Opera -- "GAZA"

A Fantastically Flawed Script for a Jazz Rock Opera -- "GAZA"
GAZA by Pat Darnell for the Age of Attritionally Challenged

Email MooPigster Customers' Alert
If you receive this post via email, you notice it is mostly 'blank'.
We at MooPig Surmise, that at this point, one either says:
"WOW, I'm off the hook, and don't have to pay any attention to that pesky MooPig STUFF!!"
-- OR --
"Hey, where is it ...?"
The answer is: "IT IS A youTUBE presentation"... and you will now click on the http above to go see this modern miracle of technology.

MooPig Wisdom is Your Life-Line to Parody:
24\7 -- We accept all Calls from Contestants

MPW Unique Value Proposition, UVP
Shards of Evidence ... Opinion and Editorial ... We Blunderbuss indigestible Ersatz of Readers' and Writers' ... Explain Strategies of quasi-firms... and some not so quasi ... 110% Proof
One Only
Advertisement Only One
Publisher of Satire ... Enemy to Bombast ... Very Swank ... More Fun to Write than to Read

MooPig Wisdom is online to provide spring board for writers.
MooPig is the Writers' Writer that encourages voice, content, and style. PD

Bill Gaines said it

Bill Gaines said it
"My staff and contributors create the magazine," declared Gaines. "What I create is the atmosphere."