The 8 Planets of Our Solar System

From scorching Mercury to frigid Neptune, the eight planets of our solar system span an incredible range of sizes, temperatures, and conditions. GeoProwl Planet Fast Facts brings you real NASA data for every planet — diameter, mass, orbital mechanics, atmospheric composition, and more.

The inner solar system contains four rocky planets with solid surfaces. Beyond the asteroid belt, two massive gas giants dominate the middle solar system, while two ice giants lurk in the outer reaches. Select any planet below to explore its full profile.