The Earth has a planetary density of 5.514 g/cm3. It makes sense that thinner or more dense atmospheres result from a higher gravity, but planetary mass is based on density and size. So smaller worlds have to be more dense to have relatively Earth normal gravity, etc.
What makes planets more dense, or less? Would it just be a larger core or higher amount of metals in the crust? Or what?
Along with that; what levels of gravity relative to Earth are human compatible for extended periods?
What makes planets more dense, or less? Would it just be a larger core or higher amount of metals in the crust? Or what?
Along with that; what levels of gravity relative to Earth are human compatible for extended periods?