SOLAR SYSTEM

Detailed explanation-1: -The terrestrial planets are the four innermost planets in the solar system. None of the terrestrial planets have rings, although Earth does have belts of trapped radiation, as discussed below. Among the terrestrials, only Earth has a substantial planetary magnetic field.

Detailed explanation-2: -Earth is the largest terrestrial planet, followed closely by Venus, then Mars, then Mercury, with Mercury being the the smallest.

Detailed explanation-3: -Formation. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle, and a solid crust.

Detailed explanation-4: -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-5: -They have a solid surface. They have a core which contains heavy elements (iron, nickel..) They have higher density due to the heavy metals. They are smaller than the gaseous planets. They are close to the sun. Do not have much moons. Have lesser gravitational pull. 29-Aug-2016