SOLAR SYSTEM

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: -A terrestrial planet, telluric planet, solid planet, or rocky planet, is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets accepted by the IAU are the inner planets closest to the Sun: Mercury, Venus, Earth and Mars.

Detailed explanation-3: -Mercury is a rocky planet, also known as a terrestrial planet. Mercury has a solid, cratered surface, much like the Earth’s moon.

Detailed explanation-4: -Thus, terrestrial planets can be described as planets that are earth-like in nature, meaning those that are similar in composition and structure to that of the earth. They are also known as ‘telluric planets’ or ‘rocky planets’.

Detailed explanation-5: -Gas Giant. Saturn is a gas-giant planet and therefore does not have a solid surface like Earth’s.