Europa is 1 of Jupiter's 63 moons, one of the four Galilean moons, and it is important because it could posssibly hold life.
Io, Europa, Ganymede, and Callisto.
Jupiter's count of moons is currently at 63. The four most important moons are Ganymede, Europa, Callisto, and Io.
Four Moons of Darkover was created in 1988.
Four Moons of Darkover has 284 pages.
The biggest four were discovered by Galileo. They are : Callisto Europa Ganymede Io
No satellites have been discovered yet in orbit around Mercury. As of now, the answer to the question is zero.
four moons
Jupiter has about 63 moons, but the four main moons of Jupiter are Europa, Ganymede, Callisto, and Io.
Galilean
Galileo is famous for having seen the four main moons of Jupiter.
The ISBN of Four Moons of Darkover is 0-88677-305-9.