(astronomy) An astronomical object in direct orbit around the Sun that is not a planet or a comet.

Synonym of exoplanet

(astronomy) Any planet of the Solar System whose orbit is located beyond the asteroid belt, i.e., any of Jupiter, Saturn, Uranus, or Neptune.

(astronomy, planets) Any planet of the Solar System whose orbit is located between the asteroid belt and the sun, i.e., any of Mercury, Venus, Earth, or Mars.

Any planet of the solar system or any exoplanet which is "Earth-like" in the sense that it is composed primarily of metals and rock, in contrast to a planet which is a gas giant.

Earth; the third planet in the Solar System

Alternative form of exoplanet

(astronomy, obsolete, archaic) A moon of a planet.

(astronomy, obsolete, archaic) A planet; a natural satellite of a sun.

(astronomy) Any of the 8 celestial bodies which orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune (a celestial body that fits the 2006 IAU definition of planet).