planet

An object that is larger than a moon but smaller than a brown dwarf and that orbits a star. The Earth is a planet, and it is the third of a series of planets in our Solar System. In order of increasing distance from the Sun, the planets in our Solar System are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. While Pluto is conventionally listed as one of the planets, it is debatable whether its small size and odd orbit allow it to be classified as such. Planets have also been discovered orbiting around other stars; these planets are called extrasolar planets.