What is the lightest planet in solar system?

Answer 1

The least massive of the 8 major planets is Mercury. However, Saturn, with its large, deep atmosphere, is the least dense of the planets, and would actually float in water (given a really big container of water).

Answer 2

Pluto, because it is the smallest planet farthest away from the sun in our solar system. It has less gravitational force then all of the planets, which means it has less mass then any other plant in our solar system

Answer 3

Saturn is the least dense planet in our Solar System. It is made up of mostly hydrogen and helium, which are the two lightest elements in the universe and thus make Saturn the lightest planet.

Answer 4

After they took off Pluto from the planets the lightest planet is Mercury.

Answer 5

Saturn

Answer 6

Mercury.