Planetary scientists remain flummoxed by the very existence of the closest planet to our Sun. This peculiar planet is tiny, 20 times less massive than Earth and barely wider than Australia. Yet Mercury is the second densest planet in our Solar System after Earth due to a large, metallic core that accounts for the majority of its mass.
The most dense planet in our Solar System is Earth, with an average density of about 5.51 g/cm³, surprisingly higher than Mercury, which is second densest due to its large iron core but less gravitational compression. Earth's immense mass creates such immense pressure that it packs its core more tightly than Mercury's, despite Mercury having heavier elements.
Densities of the Solar System Planets (g/cm³):
Earth: 5.51
Mercury: 5.43
Venus: 5.24
Mars: 3.93
Neptune: 1.64
Jupiter: 1.33
Uranus: 1.27
Saturn: 0.69 (less dense than water!)
The most dense planet in our Solar System is Earth, with an average density of about 5.51 g/cm³, surprisingly higher than Mercury, which is second densest due to its large iron core but less gravitational compression. Earth's immense mass creates such immense pressure that it packs its core more tightly than Mercury's, despite Mercury having heavier elements.
Densities of the Solar System Planets (g/cm³):
Earth: 5.51
Mercury: 5.43
Venus: 5.24
Mars: 3.93
Neptune: 1.64
Jupiter: 1.33
Uranus: 1.27
Saturn: 0.69 (less dense than water!)
