07-25-2015, 07:05 AM
The lowest density figures would give a waterworld, which could conceivably have an abiotic oxygen atmosphere. Although I wouldn't expect advanced life on a waterworld, it could support an ocean-going colony.
Trouble is, most rocky planets heavier than Earth are likely to be denser, with high gravity and thicker atmospheres. This doesn't rule out life, but it does rule out anything like Earth life.
Trouble is, most rocky planets heavier than Earth are likely to be denser, with high gravity and thicker atmospheres. This doesn't rule out life, but it does rule out anything like Earth life.