- In Depth | Ganymede – NASA Solar System Exploration
In Depth 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 Telescope has found the best evidence yet for an underground saltwater ocean on Ganymede
- In Depth | Our Solar System – NASA Solar System Exploration
The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy 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; dozens of moons; and millions of asteroids, comets, and meteoroids Beyond our own solar system, there
- In Depth | Callisto – NASA Solar System Exploration
Callisto was discovered Jan 7, 1610, by Italian scientist Galileo Galilei along with Jupiter’s three other largest moons: Ganymede, Europa and Io Callisto is named for a woman turned into a bear by Zeus in Greek mythology
- Jupiter - NASA Solar System Exploration
From top to bottom, the moons shown are Io, Europa, Ganymede, and Callisto These resources include activities that can be done at home, as well as videos, animations, posters, and online interactives NASA's Juno spacecraft saw this striking vista during a close flyby of Jupiter
- In Depth | Io – NASA Solar System Exploration
Io’s remarkable activity is the result of a tug-of-war between Jupiter's powerful gravity and smaller but precisely timed pulls from two neighboring moons that orbit farther from Jupiter – Europa and Ganymede
- Callisto - NASA Solar System Exploration
Italian astronomer Galileo Galilei discovered Callisto and Jupiter’s other three large moons: Ganymede, Io and Europa The discovery led to the understanding that planets in our solar system orbit the Sun, instead of our solar system revolving around Earth
- 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
- In Depth | Titan – NASA Solar System Exploration
Only Jupiter's moon Ganymede is larger, by just 2 percent Titan is bigger than Earth's moon, and larger than even the planet Mercury This mammoth moon is the only moon in the solar system with a dense atmosphere, and it’s the only world besides Earth that has standing bodies of liquid, including rivers, lakes and seas, on its surface
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