Which planets are the rocky planets?

Planets come in different sizes, compositions, and colors. Mercury, Venus, Earth, and Mars, the four planets closest to the Sun, are called “rocky” or “terrestrial” planets. Mars, Mercury, and Venus are similar to Earth in composition. Heat from the Sun evaporated lightweight elements like hydrogen and helium into interplanetary space. Mostly rock and metal was left in this zone and clumped together to form the inner rocky planets. They have no rings and only two of themEarth and Marshave moons.


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