User:Exoplanetaryscience/Drake equation refinement

The following are my proposed refinements to the drake equation, based on our understanding of how life has formed, and what would be necessary for human-like life:


 * star must have a low total galactic inclination
 * star must have an eccentricity of <0.2
 * star must be in a stable spiral galaxy
 * star must be in >second generation
 * star must be further away than the outer galactic bar
 * star must be closer than the inner halo
 * star must have formed in a metal-rich nebula
 * star must have formed in close proximity to other stars
 * star must be F0
 * star must not be a flare star
 * star must not be a subdwarf
 * star must not be a major variable
 * star must not be a binary
 * star must have a substantial outer ice cloud
 * system must have major planetary companions
 * planet must suffer major impact at some point OR have major moon/core
 * planet must be >0.7 and <4.0 EM
 * planet must have active plate tectonics
 * planet must obtain substantial water
 * planet must have atmosphere
 * planet must have ~perpendicularly-aligned field
 * planet must not be tidally locked
 * planet must be within habitable zone
 * planet must be in circular orbit
 * planet must orbit in same plane
 * planet must be younger than (star lifespan*0.6)