Tuesday, 1 November 2016

The Planet Cain

Approximately Earth-sized;
just over one astronomical unit from its G-nine star;
15 % denser atmosphere;
more greenhouse effect;
20 hour day;
no moons;
32 degree axial tilt;
therefore, complicated seasons.

Is "no moons" possible? I have heard of several ways in which Earth's comparatively large Moon might have made our planet habitable, e.g., here, but I am not a scientist.