[Space] GURPS Handbook of the Planets

[Whill]

Originally Posted by Nemoricus

Since the maximum mass a gas giant could have in orbit around it is .4 Earth masses and the Tiny size class is ludicrously permissive, I see no particular reason why you couldn't start at the innermost orbit and roll to determine the proportion of the gas giant's remaining mass budget the moon gets.

A gas giant can only have a moon system that totals no more than .4 Earth masses? If that is in the GURPS Space system, I missed it. Or is that in reality based on current science?

So does this mean I can't have even 1 Earth-massed moon around my gas giant? If these more massive major moons just can't form there, are there any plausible migration/capture scenarios that could account for them being there?