Could moons be Dwarf Planets that came into orbit around gas giants when they formed?
The most probable captured dwarf planet that became a satellite is Triton in Neptune. That is abiding by the rule that such an object is massive enough to be spherical and that it must have been crowded where once Triton is. The thing is, the biggest clutter in its orbit is Neptune or should it be the other way around? Hehehe… Most of the large and spherical moons around Jupiter, Saturn and Uranus are formed naturally as the amount of matter that formed these planets clumped after the planet itself formed. The other smaller satellites are probably captured asteroids or centaurs. Clear skies!
