Eta-Earth Revisited II: Deriving a Maximum Number of Earth-Like Habitats in the Galactic Disk
Manuel Scherf, H. Lammer, Laurenz Sproß
Abstract
, the origin of life, working carbon-silicate and nitrogen cycles); this also implies extraterrestrial intelligence (ETI) to be significantly rarer still. Our results illustrate that not every star can host EHs nor can each rocky exoplanet within the HZCL evolve such that it might be able to host complex animal-like life or even ETIs. The Copernican Principle of Mediocrity therefore cannot be applied to infer that such life will be common in the galaxy.
Topics & Concepts
Earth (classical element)AstrobiologyExoplanetCircumstellar habitable zonePlanetHabitatAstronomyPlanetary habitabilityPhysicsGeologyEcologyBiologyStellar, planetary, and galactic studiesAstro and Planetary ScienceAstrophysics and Star Formation Studies