Anyone who wishes to save the environment with an ambitious plan.

(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.

plural of terrestrial planet

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.

plural of inferior planet

plural of mean planet

plural of sister planet