This is more sort of a research question.
Presuming a planet with more or less the same makeup of the solid
portion, the same age, and same distance from the sun, how large or
small can the planet be to be habitable by humans? I *think* the
primary issue is that if it is larger than a certain size then the
planet won't lose the Hydrogen/Helium in the atmosphere and become a
close in Gas Giant and if it is smaller than a certain size, it won't
keep it's Oxygen long enough (which puts the minimum somewhat larger
than Mars (or would Mars have kept its oxygen if it had a
Magnetosphere)).
Any ideas where to look for info on this? |
