Which of the four terrestrial planets is the largest?

The Earth is the largest of the terrestrial planets with a diameter of 12,742 km.

The four innermost planets of our solar system (Mercury, Venus, Earth and Mars) are called the “terrestrial” planets. The name comes from the word “telluric” derived from the Latin words “terra” and “tellus”, used to refer to Earth. They are made mostly of silicate rocks and metals, with solid surfaces and atmospheres that range from thick (on Venus) to very thin (on Mercury). Earth is the only one with liquid oceans, although Mars may have had them in the past.

Name Diameter Distance from the Sun Orbit Period

Mercury 4,879 km 57,909,227 km (0.39 AU) 88 days

Venus 12,104 km 108,209,475 km (0.73 AU) 225 days

Earth 12,742 km 149,598,262 km (1 AU) 365.26 days

Mars 6,779 km 227,943,824 km (1.38 AU) 687 days