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  1. Callisto: A Cratered Ice World
    Callisto is a giant moon of Jupiter, almost as big as Mercury, but much less dense and rocky.
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  2. WebApr 19, 2023 · Bibliography. Callisto is Jupiter's second-largest moon and the outermost of the Galilean satellites. It has an ancient, cratered surface, indicating that geological processes could be dead....

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  3. People also ask
    Callisto ( / kəˈlɪstoʊ /, kə-LIST-oh ), or Jupiter IV, is the second-largest moon of Jupiter, after Ganymede. In the Solar System it is the third-largest moon after Ganymede and Saturn 's largest moon Titan, and as large as the smallest planet Mercury, though only about a third as massive.
    It was discovered in 1610 by Galileo Galilei and named after Kallisto. It is the second largest moon orbiting Jupiter, after Ganymede, and the third largest moon in the Solar System. Callisto is almost the same size as the planet Mercury, being 99% the diameter of the planet, but is much less massive.
    Jupiter's four largest moons — Io, Europa, Ganymede and Callisto — are also known as the Galilean moons, named after Galileo Galilei, who discovered them in 1610. All four are bigger than Pluto, and Ganymede is the largest moon in the solar system, even bigger than Mercury .
    Callisto is named for a woman turned into a bear by Zeus in Greek mythology. Zeus is identical to the Roman god Jupiter. Callisto is Jupiter’s second largest moon after Ganymede and it’s the third largest moon in our solar system. It’s almost as big as Mercury. Callisto’s circumference at its equator is about 9,410 miles (15,144 kilometers).
    science.nasa.gov
  4. WebCallisto is the second largest moon in the Jupiter system and is nearly the size of Mercury. It is the most distant of the Galilean moons from Jupiter. It was discovered in 1610 by Galileo Galilei and independently observed …

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