I WONDER - How Many Moons Does Jupiter Have?

Jupiter has 80 moons, the second most in the solar system. Of these, 57 have official names, while 23 are awaiting names. Galileo Galilei first observed Jupiter's four largest moons—Io, Europa, Ganymede, and Callisto—in 1610. These moons are the largest in the solar system, with Ganymede being the largest, even bigger than Mercury.

How many moons of Jupiter are currently awaiting official names?

Which moon of Jupiter is the largest and how does it compare in size to Mercury?