Natural satellites are those heavenly bodies of the solar system which revolve round the planets in their own elliptical orbits.
The natural satellite of Earth is moon. There are about 205 natural satellites in our solar system revolving around 6 planets. Two planets in our solar system do not have natural satellite, they are Mercury and Venus. Neptune's natural satellite is the largest irregular shaped moon in the solar system. Jupiter has the largest moon in the solar system named Ganymede and the second largest moon belongs to Saturn.