UPSC CSE Prelims 2002
The Earth possesses an average density of approximately 5.52 g/cm³, making it the densest planet in the solar system. For comparison, Mercury has a density of about 5.43 g/cm³, Venus 5.24 g/cm³, and Mars 3.93 g/cm³.
The predominant element in the composition of Earth by mass is iron (Fe), constituting approximately 35% of its total mass. While silicon is abundant, it is primarily concentrated in the Earth's crust and mantle, not its overall composition.
The Sun accounts for approximately 99.86% of the total mass of the solar system, not 75%. This immense mass dominates the gravitational dynamics of the solar system.
The diameter of the Sun is approximately 109 times that of the Earth, not 190 times. The Sun's diameter is about 1.39 million kilometers, while Earth's is about 12,742 kilometers.