That's the tidal locking.The Moon's centre of gravity is closer to the earth than it's geometrical center。Just like that there is a tight rope between the earth and the moon,and the moon faces us only with one side.
Jungle Cruise
No, just his backside.
no
Yes, it is possible to see Jupiter's four largest moons, known as the Galilean moons, with just a pair of binoculars or even with the naked eye. These moons are Io, Europa, Ganymede, and Callisto.
He saw 4 moons
With a telescope
See related link for a full list of all 61 moons
Saturn has 60 known moons that have been discovered and verified so far. See the Related Link. Saturn has 62 known moons.
If you see two moons, either you are no longer on planet Earth (which has only one moon) or you are suffering from double vision.
1
Please see related question for a complete listing of Jupiter's 40+ moons.
Uranus has 27 moons and Neptune has 13 moons