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  1. Jupiter - NASA Solar System Exploration

    Sep 3, 2025 · Facts About Jupiter Jupiter is the largest and oldest planet in our solar system. If Jupiter was a hollow shell, 1,000 Earths could fit inside. But the "King of Planets" is no lumbering giant — …

  2. 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 …

  3. 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 …

  4. In Depth | Amalthea – NASA Solar System Exploration

    Amalthea and Thebe rotate on their axes once for each orbit around Jupiter, always keeping the same side facing the planet. This orbit takes about one-half an Earth day for Amalthea and two-thirds an …

  5. 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.

  6. In Depth | Jupiter Moons – NASA Solar System Exploration

    NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

  7. In Depth | Our Solar System – NASA Solar System Exploration

    Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; …

  8. In Depth | Io – NASA Solar System Exploration

    Jupiter's rocky moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains dozens of miles (or kilometers) high.

  9. Callisto - NASA Solar System Exploration

    Jun 26, 2019 · Juno is on a mission to probe beneath Jupiter's dense clouds and answer questions about the origin and evolution of Jupiter, and our solar system.

  10. In Depth | Asteroids – NASA Solar System Exploration

    Early in the history of the solar system, the gravity of newly formed Jupiter brought an end to the formation of planetary bodies in this region and caused the small bodies to collide with one another, …