Moons orbit planets. Our moon goes around the Earth once every 27.3 days or about once a month. As the Earth orbits the Sun, the moon orbits the Earth. Not all the planets have moons, now do all the planets have one moon like the earth as we can see in the table below.

The outer giant planets – Jupiter, Saturn, Uranus, and Neptune probably have more moons than known because many are small and hard to discern on photographs since these planets are so far away from us.

Moons orbit planets much the same as planets orbit the sun. Many revolve in elliptical orbits and some in nearly circular orbits. When searching for moons on a photographic plate, the teams had to first familiarize themselves with the characteristics of viewing an orbiting moon from different perspectives. Most moons orbit in or near the equatorial plane of the planet – meaning around the equator. No known moon goes around the north and south pole.

Using images from the unmanned probe Aeneas I (a sample shown below), the teams were able to discover the new planet has two moons.