What are the inner planets made of?

The terrestrial inner planets are composed largely of refractory minerals, such as the silicates, which form their crusts and mantles, and metals such as iron and nickel which form their cores. Three of the four inner planets (Venus, Earth and Mars) have atmospheres substantial enough to generate weather. read more

The inner planets are made of rocks and metals and are called the terrestrial planets. They are Mercury, Venus, Earth and Mars. As of 2014, Earth is the only terrestrial planet known to have life. read more

Earth and the other three inner planets of our solar system (Mercury, Venus and Mars) are made of rock, containing common minerals like feldspars and metals like magnesium and aluminum. So is Pluto. The other planets are not solid. read more