Answer:
There are eight planets in the solar system. First four planets are known as inner planets. They have rocky surface and hence are called Terrestrial planets. Terrestrial planets were formed from the planetesimals composed of rocks and metals. Terrestrial planets are - Mercury, Venus, Earth and Mars.
The outer planets are Jovian planets composed mainly of Hydrogen and Helium. The core of the Jovian planets is made up of rocks and ice as these were formed in the outer regions of the solar system. Jovian Planets are Jupiter, Saturn, Uranus, Neptune.
