Not all planets have moons. In the solar system, Mercury and Venus do not have any moons orbiting them. All of the other planets, including the Earth, have one or more natural satellites. More »

In this solar system, Mercury and Venus have no moons. Mercury is the smallest planet in the solar system and only slightly larger than Earth's moon. It is the closest planet to the Sun. Venus is the second closest plane... More »

www.reference.com Science Astronomy Planets

Many other planets have moons. There are 166 natural satellites in the solar system orbiting six different planets, including Earth. Jupiter has 63 orbiting moons, followed by Saturn's 60. Uranus has 27 moons, Neptune ha... More »

www.reference.com Science Astronomy Planets

According to NASA, none of the planets in the solar system are known to have exactly four moons. It is noted that Jupiter has four large moons, known as the Galilean Satellites, but the gas giant might have up to 46 addi... More »

Gravity is the force that keeps all of the planets, dwarf planets, moons, asteroids and comets orbiting the Sun. The force of gravity is inversely proportional to the distance of any two objects. This means that objects ... More »

Many other planets have moons. There are 166 natural satellites in the solar system orbiting six different planets, including Earth. Jupiter has 63 orbiting moons, followed by Saturn's 60. Uranus has 27 moons, Neptune ha... More »

www.reference.com Science Astronomy Planets

The number of moons is constantly changing for some planets as they are discovered, but at the last official count there are 166 moons, with more than 20 waiting to be recognized as moons. This count is only of the moons... More »

www.reference.com Science Astronomy Planets