It should be noted though that objects need to have a minimum mass of around 1021 kg to be able to hold an atmosphere, so that excludes a lot of the smaller objects. An atmosphere is important because it gives potential settlers a constant source of gases (e.g. CO2), stabilizes the temperature between night and day, and protects them somewhat from radiation.
It should be noted though that objects need to have a minimum mass of around 1021 kg to be able to hold an atmosphere, so that excludes a lot of the smaller objects. An atmosphere is important because it gives potential settlers a constant source of gases (e.g. CO2), stabilizes the temperature between night and day, and protects them somewhat from radiation.