Planet

A planet was a celestial body orbiting a star. It was informally called a "world" by its sentient inhabitants. A planet was neither a binary star or a moon. Due to gravitational influence it cleared out the area around the orbit and caused smaller bodies to accrete with it. A consequence is, that a planet would not share its orbit with another similar-sized body, except for moons collected by gravity.

Two types of planets existed in the galaxy, gas giants and terrestrial (rocky) worlds. Moons orbiting gas giants or terrestrials were not considered as planets. Depending on the tilt of the planet's axis, temperature and climate varied, and in turn, habitability varied. Terrestrial worlds, had dramatically varied landscapes, such as being completely oceanic (Manaan, Dac and Kamino), covered in thick rainforests (Kashyyyk and Felucia), completely frozen, or experiencing ice ages (Hoth and Nelvaan). Some planets, such as Tatooine were nothing more than just big deserts, with very few minerals, while others, such as Coruscant were covered in one big, planet-wide city (ecumenopolis). Some planets had a mix of landcapes, which included oceans, mountains, and landmasses.

Life-bearing planets had nitrogen/oxygen based atmospheres, while gas giants, which had mostly gaseous and liquid layers, were rarely inhabited. Some gas giants had life zones in their atmospheres, but that was very rare. Most gas giants were used for mining.