What are Inner Planets

Inner Planets
# The inner Solar System is the traditional name for the region comprising the terrestrial planets and asteroids.

# They are composed mainly of silicates and metals.

# The four inner or terrestrial planets have dense, rocky compositions, few or no moons, and no ring systems.

# They 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; all have impact craters and tectonic surface features, such as rift valleys and volcanoes.

# The term inner planet should not be confused with the inferior planet, which designates those planets that are closer to the Sun than Earth is (i.e. Mercury and Venus).

# The term superior planet designates planets outside Earth’s orbit and thus includes both the outer planets and Mars.