Learn about the eight planets and five dwarf planets in our solar system, their sizes, locations, temperatures, and features. Explore the inner and outer planets, their moons, and the hypothetical Planet X with NASA.

Learn about the Sun and the eight planets that orbit it, as well as the nine dwarf planets and their moons. Find out how the Solar System formed, how it is structured, and how it interacts with the galaxy.

Learn about the Sun and the eight planets that orbit around it, as well as their moons, asteroids, comets, and other features. Explore the origin, evolution, and composition of the solar system with Britannica's articles, videos, and diagrams.

Learn about the sun, planets, dwarf planets, moons, asteroids, and comets in our solar system. Explore news, events, multimedia, and missions from NASA's science website.

Learn about the eight official planets in our solar system, their names, order, features, and categories. Find out the definition of a planet, the debate over Pluto, and the difference between terrestrial and giant planets.

Learn about the Sun, the star at the center of our solar system, and the eight planets, 146 moons, comets, asteroids, and dwarf planets that orbit it. Find out how long it takes each planet to go around the Sun and how many moons they have.

Learn about the Sun, planets, dwarf planets, moons, asteroids, and comets that make up our solar system. Find out how it formed, how big it is, and how it compares to other star systems.

Learn about the eight planets in our solar system, their sizes, types, orbits and features. Find out how the solar system was formed, what is a planet, and whether there is a Planet Nine.

Learn about the eight planets and five dwarf planets in our solar system, their features, moons, and more. Find detailed information, questions, and buyer's guides for astronomy enthusiasts.