Mercury
Smallest planet, nearest the Sun, cratered terrain, no moons.
Planets of the Solar System
This index page helps you compare the eight planets quickly. Open any profile for tables, atmosphere notes, moons, exploration highlights, and related reading.
Venus
Earth-sized but far hotter due to a dense greenhouse atmosphere.
Earth
Rocky, ocean-covered world with one moon and active plate tectonics.
Mars
Cold red planet with evidence of ancient water and active rover missions.
Jupiter
Largest planet, strong magnetic field, many moons, giant storms.
Saturn
Gas giant with spectacular ring structures and diverse moons.
Uranus
Ice giant tipped on its side with unusual seasonal geometry.
Neptune
Distant ice giant known for high-speed winds and Triton.