Drake Equation Rechner — Formel
## The Drake Equation
**N = R* × fp × ne × fl × fi × fc × L**
- **R*** = rate of suitable star formation (stars/year)
- **fp** = fraction with planetary systems
- **ne** = habitable planets per system
- **fl** = fraction where life develops
- **fi** = fraction developing intelligence
- **fc** = fraction developing detectable technology
- **L** = years a civilisation remains detectable
Formulated by Frank Drake in 1961, this is a framework for thinking about extraterrestrial intelligence, not a precise prediction. Estimates of N range from less than 1 to millions.
**N = R* × fp × ne × fl × fi × fc × L**
- **R*** = rate of suitable star formation (stars/year)
- **fp** = fraction with planetary systems
- **ne** = habitable planets per system
- **fl** = fraction where life develops
- **fi** = fraction developing intelligence
- **fc** = fraction developing detectable technology
- **L** = years a civilisation remains detectable
Formulated by Frank Drake in 1961, this is a framework for thinking about extraterrestrial intelligence, not a precise prediction. Estimates of N range from less than 1 to millions.
Lösungsbeispiel
Moderate estimates for each parameter.
- N = 1.5 × 1.0 × 0.2 × 0.13 × 0.01 × 0.01 × 10000
- = 1.5 × 0.2 × 0.13 × 0.01 × 0.01 × 10000
- = 1.5 × 0.2 × 0.13 × 1 = 0.039
- N ≈ 0.039 (suggests we may be alone in the Galaxy with these values)
- Adjusting L to 1 000 000 years gives N ≈ 3.9