Drake equation
E6344
The Drake equation is a probabilistic formula used to estimate the number of technologically advanced extraterrestrial civilizations that might exist in our galaxy.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Drake equation canonical | 8 |
| Drake Equation | 1 |
| Intelligent Life in the Universe | 1 |
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical equation
ⓘ
equation in astrobiology ⓘ probabilistic formula ⓘ scientific model ⓘ |
| appliesTo |
Milky Way
ⓘ
surface form:
Milky Way galaxy
|
| creator | Frank Drake ⓘ |
| defines | N ⓘ |
| describedBySource | Project Ozma meeting ⓘ |
| field |
SETI
ⓘ
astrobiology ⓘ astronomy ⓘ cosmology ⓘ statistics ⓘ |
| hasCriticism |
can give misleading impression of precision
ⓘ
may reflect observer selection effects ⓘ parameters are poorly constrained ⓘ |
| hasFormula | N = R* × fp × ne × fl × fi × fc × L ⓘ |
| hasPart |
L
ⓘ
N ⓘ R* ⓘ fc ⓘ fi ⓘ fl ⓘ fp ⓘ ne ⓘ |
| hasQuality |
highly uncertain parameters
ⓘ
multiplicative model ⓘ order-of-magnitude estimate ⓘ speculative ⓘ |
| hasVersion | extended Drake equations including additional factors ⓘ |
| inception | 1961 ⓘ |
| influenced |
Bayesian models of extraterrestrial life
ⓘ
Fermi paradox discussions ⓘ modern SETI research programs ⓘ |
| mainSubject |
Milky Way
ⓘ
surface form:
Milky Way galaxy
extraterrestrial intelligence ⓘ technologically advanced civilizations ⓘ |
| namedAfter | Frank Drake ⓘ |
| notableWork | used in 1961 Green Bank conference on SETI ⓘ |
| use |
estimate number of communicating extraterrestrial civilizations
ⓘ
guide SETI observational strategies ⓘ illustrate scientific uncertainties about extraterrestrial life ⓘ structure discussion of factors in the search for extraterrestrial intelligence ⓘ |
| variableMeaning |
L = average lifetime of detectable civilizations
ⓘ
N = number of detectable civilizations in the Milky Way ⓘ R* = average rate of star formation in the galaxy ⓘ fc = fraction of intelligent civilizations that develop detectable technology ⓘ fi = fraction of life-bearing planets where intelligent life evolves ⓘ fl = fraction of habitable planets where life actually appears ⓘ fp = fraction of stars with planetary systems ⓘ ne = average number of habitable planets per star with planets ⓘ |
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Drake Equation
this entity surface form:
Intelligent Life in the Universe