The Galilean moons are the four largest moons of Jupiter discovered by Galileo Galilei on January 7, 1610.
They are (In order of size)
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Jupiter's volcanically active moon is Io.it has more than 400 active volcanoes
Ganymede is the largest moon and it is thought to have liquid water under the surface. Callisto is the second largest and has the most craters of any known planet, moon, or asteroid. Io is the most volcanically active moon in the solar system. Europa is the smallest of the Galilean moons and is the most likely to have liquid water.
Europa
Ganymede is the Galilean moon known for having a grooved terrain. These grooves are believed to be the result of tectonic activity on the moon's surface.
No. The Galilean moons are the four largest moons of Jupiter (Io, Europa, Ganymede, and Callisto) discovered by Galileo. Titan is the largest moon of Saturn, discovered by Christiaan Huygens.
No. It is a moon of Mars. The Galilean moons are moons of Jupiter.
Jupiter's volcanically active moon is Io.it has more than 400 active volcanoes
Io, one of Jupiter's moons, is the most volcanically active body in the solar system. The reason for this is tidal heating which is created by the gravitational pull of Jupiter and the other three Galilean moons.
Ganymede is the largest moon and it is thought to have liquid water under the surface. Callisto is the second largest and has the most craters of any known planet, moon, or asteroid. Io is the most volcanically active moon in the solar system. Europa is the smallest of the Galilean moons and is the most likely to have liquid water.
Jupiter's volcanically active moon is Io.it has more than 400 active volcanoes
Ganymede is the largest Galilean moon, the largest Jovian moon, and the largest moon in the solar system.
Charon is a moon of Pluto. [See related question] To be a Galilean moon you have to be one of the four major moons of Jupiter.
No. Io is a moon of Jupiter. No known moon has a moon.
Jupiter.
Europa
Jupiter's moon Io is the most volcanically active world in the Solar System
Callisto with a semi major axis of 1,882,700 km. See related question.