In Depth | Ganymede – NASA Solar System Exploration
Jupiter’s moon Ganymede is proving to be a fascinating world. Not only is it the largest moon in our solar system, bigger than the planet Mercury and the dwarf planet Pluto, but NASA’s …
In Depth | Europa – NASA Solar System Exploration
Jupiter’s moons Io, Europa, and Ganymede are in what is called a resonance – every time Ganymede orbits Jupiter once, Europa orbits twice, and Io orbits four times.
Jupiter - NASA Solar System Exploration
Sep 3, 2025 · If Jupiter was a hollow shell, 1,000 Earths could fit inside. But the "King of Planets" is no lumbering giant — Jupiter has the shortest day in the solar system, taking about 9.9 …
In Depth | Our Solar System – NASA Solar System Exploration
The giant planets Jupiter and Saturn lead our solar system’s moon counts. In some ways, the swarms of moons around these worlds resemble mini versions of our solar system.
In Depth | Callisto – NASA Solar System Exploration
Jupiter and its moons orbit about 484 million miles (778 million kilometers) from our Sun. It takes the Jovian system—Jupiter and all of its moons—about 12 Earth years to complete one orbit …
In Depth | Titan – NASA Solar System Exploration
Titan’s internal structure isn’t entirely known, but one model based on data from the Cassini-Huygens mission suggests Titan has five primary layers. The innermost layer is a core of rock …
During its mission, Juno will map Jupiter’s gravity and magnetic fields to learn what the planet’s interior structure is like. The spacecraft also will observe the composition and circulation of the …
RPS 3D Viewer - NASA Solar System Exploration
Oct 21, 2025 · Moons About Moons BY DESTINATION Earth (1) Mars (2) Jupiter (95) Saturn (83) Uranus (27) Neptune (14) Pluto (5) Asteroids, Comets & Meteors About Asteroids, Comets & …
In Depth | Earth's Moon – NASA Solar System Exploration
Earth's only natural satellite is simply called "the Moon" because people didn't know other moons existed until Galileo Galilei discovered four moons orbiting Jupiter in 1610.
In Depth | Kuiper Belt – NASA Solar System Exploration
Pieces produced by colliding KBOs can be pushed by Neptune's gravity into orbits that send them sunward, where Jupiter further corrals them into short loops lasting 20 years or less. These …