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 Hubble Space …
Planet Compare - NASA Solar System Exploration
Oct 21, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
In Depth | Callisto – NASA Solar System Exploration
This page showcases our resources for those interested in learning more about Jupiter. It includes activities that can be done at home as well as videos, animations, stories, and articles.
In Depth | Europa – NASA Solar System Exploration
Europa orbits Jupiter every 3.5 days and is locked by gravity to Jupiter, so the same hemisphere of the moon always faces the planet. Jupiter takes about 4,333 Earth days (or about 12 Earth years) to …
In Depth | Io – NASA Solar System Exploration
Some of the ions are pulled into Jupiter's atmosphere along the magnetic lines of force and create auroras in the planet's upper atmosphere. It is the ions escaping from this torus that inflate Jupiter's …
In Depth | Titan – NASA Solar System Exploration
High in Titan’s atmosphere, methane and nitrogen molecules are split apart by the Sun's ultraviolet light and by high-energy particles accelerated in Saturn's magnetic field.
Jupiter - NASA Solar System Exploration
Sep 3, 2025 · Unlike Earth’s Moon and our planet’s northern lights, the massive, shimmering auroras above Jupiter’s poles carry signatures that the planet’s largest moons leave in the atmosphere.
In Depth | Earth's Moon – NASA Solar System Exploration
With too sparse an atmosphere to impede impacts, a steady rain of asteroids, meteoroids, and comets strikes the surface of the Moon, leaving numerous craters behind.
In Depth | Moons – NASA Solar System Exploration
In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons. As these planets grew in the early solar system, they were able to capture smaller …
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.