'circular'.
Things that orbit around other things are called satellites, manufactured or not.
No, the moons of Mars (Phobos and Phoebe) orbit Mars. Jupiter is another planet and has its own moons.
Only one. The Moon
Yes. One moon orbit Earth (The moon)
Earth is.
Earth is.
Approximately 75% of the moons in our solar system orbit in the same direction that their planets rotate. This is known as prograde motion. Moons that orbit in the opposite direction are called retrograde.
Pluto was one of Neptune's moons that somehow escaped its orbit.
Any object in space with enough gravity to keep a moon in orbit can have moons. Pluto is one of those objects.
The moons of Uranus. See related question.
elliptical orbit with earth at one focus.
No. For one thing, a plane is, by definition, 2-dimensional. The moon's orbit is tilted about 5 degrees relative to Earth's orbit.