Which one of the following planets has the highest density?

The planets of our solar system are categorized into terrestrial (inner) and Jovian (outer) groups, with the inner planets being significantly denser due to their rocky and metallic compositions [2]. Among all planets, Earth has the highest mean density, recorded at approximately 5.51 g/cm3. This high density is attributed to its large metallic core and the effects of internal gravitational compression. Mercury follows as the second densest planet with a mean density of approximately 5.43 g/cm3. Venus, often called Earth's twin due to its similar size and mass, also has a high density but remains less dense than both Earth and Mercury [1]. In contrast, gas giants like Jupiter have much lower densities, often around 1.3 g/cm3, because they are primarily composed of hydrogen and helium [2].

Sources

1. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 2: The Solar System > 2.4. Planets > p. 25
2. [1] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 2: The Earth's Crust > The Solar System > p. 2