Multiple choice general knowledge Which is the densest major body in solar system Pluto Jupiter Earth Moon Reveal answer Fill a bubble to check yourself C Correct answer Explanation Earth is the densest major body in the Solar System with an average density of 5.51 g/cm³, due to its high iron-nickel core. Jupiter is less dense (1.33 g/cm³), Pluto is even less (1.85 g/cm³), and the Moon is 3.34 g/cm³.