Of the four main moons of Jupiter called the Galilean Moons, only two are geologically active. Io is the most clearly geologically active with hundreds of volcanoes that frequently erupt. Europa is the second moon that's geologically active as evidenced by its smooth icy surface suggesting a warm liquid ocean underneath.
Jupiter
Jupiter (the satellite in question being the moon Io).
Io has over 400 active volcanoes, it is the most geologically active object in the Solar System.
Io
Jupiter
The Galilean moons orbit the planet Jupiter.
Callisto is composed of rock and ice and is the least dense of the Galilean moons.
Jupiter
Jupiter. The "Galilean" moons are the four largest moons, which are so large that Galileo was able to see them orbiting Jupiter even with his relatively modest telescope.
Jupiter has 79 moons and there are 4 major moons; The Galilean moons named after Galileo.
The Galilean moons orbit the planet Jupiter.
No. It is a moon of Mars. The Galilean moons are moons of Jupiter.
The Galilean moons orbit Jupiter.
Because they were discovered first by Galileo.
The Galilean moons were discovered by Galileo Galilei in 1610.
Jupiters Moons
The nitrogen is different between the two.
No. There are four Galilean moons: Io, Europa, Ganymede, and Callisto.
They were discovered by Galileo.
Callisto is composed of rock and ice and is the least dense of the Galilean moons.
The Galilean moons are the four largest moons of Jupiter, so called because they were discovered by Galileo Galilei.
Galilean