INDIAN GEOGRAPHY

Detailed explanation-1: -Mercury is the planet that orbits the closest to the Sun.

Detailed explanation-2: -Mercury has an unusual internal structure. Most of its inside (core) is taken up by a large ball of iron, which weighs more than the rocky layers-mantle and crust-lying above it. In comparison, Earth’s core makes up a lesser part of its mass. Because Mercury is so small, its gravity is weaker than other planets’.

Detailed explanation-3: -In the inner Solar System, we find the “Inner Planets” – Mercury, Venus, Earth, and Mars – which are so named because they orbit closest to the Sun. In addition to their proximity, these planets have a number of key differences that set them apart from planets elsewhere in the Solar System.