The density of Saturn is 690 kg/ m3,
whereas the density of Neptune is 1640 kg /
m3. Hence Neptune is denser (and
Saturn is lighter).
Density is the mass per unit volume.
Answer 2:
Saturn is more massive and closer to the sun, so
the force of gravity (i.e. weight) that the sun
exerts on Saturn is stronger than the force that
the sun exerts on Neptune.
