Jupiter planet: Discover everything about Jupiter

Discover everything about Jupiter, the largest planet in the solar system: characteristics, composition and curiosities. Learn about its moons, its atmosphere and the mysteries that surround it. Jupiter is the largest planet in our solar system. Jupiter ’s iconic Great Red Spot is a giant storm bigger than Earth. Get Jupiter facts. Jupiter is the biggest planet in the solar system and has 79 moons. Learn more about the gas giant in our ultimate guide. Jupiter was the first planet in our Solar System to form. It was probably born much closer to the Sun before migrating to its current position about four billion years ago, scattering asteroids and comets with its gravity in the process.