> What are terrestrial planets? Terrestrial planets have a solid planetary surface, making them substantially different from the larger giant planets, which ar

> What are terrestrial planets? Terrestrial planets have a solid planetary surface, making them substantially different from the larger giant planets, which are composed mostly of some combination of hydrogen, helium, and water existing in various physical states. 1. https://en.wikipedia.org/wiki/Terrestrial_planet https://en.wikipedia.org/wiki/Terrestrial_planet