Planet

Planet is a large ball of rocks and gas, that is orbithing star.

Rocky
Planets, consisting of different rocks and metals.

Terra
Planets, consisting of rocks, metals and water. Our Earth is terra-type planet

Gas Giants
Giant planets (90,000 - 300,000 km) consisting mostly of hydrogen, methane and other gases.

Ice Giants
Ice giants are Gas giants with extremely low temperature.

Examples
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune