GENERAL KNOWLEDGE

Detailed explanation-1: -The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth’s terra firma. The terrestrial planets are the four innermost planets in the solar system.

Detailed explanation-2: -Earth has a number of nicknames, including the Blue Planet, Gaia, Terra, and “the world” – which reflects its centrality to the creation stories of every single human culture that has ever existed. But the most remarkable thing about our planet is its diversity.

Detailed explanation-3: -Venus and Earth are sometimes called twins because they’re pretty much about the same size. Venus is almost as big as Earth. They also formed in the same inner part of the solar system.