Planet

A planet, often called a world, was a large celestial body that was in orbit around a star. Planets often had smaller bodies called moons that could be in orbit around the planet. Many planets were habitable, meaning they were suitable for sentient beings to live on. Planets came in many sizes and compositions, with worlds the size of Cordelia and Zulmitune- which diameters of 12,327 and 14,120 kilometers, respectively- often supporting an abundance of life, with smaller worlds like the 7,395 kilometer diameter Izurn had less diversified climates, though still supported life. Planets were generally categorized into three types: terrestrial planets, aquatic planets and gas giants. A group of planets, moons, and asteroids orbiting around a star are collectively called a star system. Billions of star systems made up the galaxy. Although planets usually orbited only one sun, some were located in systems that orbited multiple.

Homeworld was a term used to describe the original home of a species, organization, or person. For example, Cordleia was the homeworld of the Cordelian species, and the Odehue species were the first inhabitants of Hisperia.

It was possible to destroy a planet, although it required a massive superweapon or other means of mass destruction on a planetary scale.