Planet

Planets are celestial objects in space. Planets are sometimes orbited by natural satellites. Cities are also often built on planetary surfaces.

Types

 * Gas giant - Planets predominately composed of gases. While the UNSC/UEG does not possess the ability to mine these worlds, the Forerunners did. Some of these gas giants were the anchor sites for Halo rings.

Human

 * Agriculture world - A world were worlds used by the Unified Earth Government to produce food for Earth and other colonies.

Covenant

 * Sangheili colonies - Colony planets settled by Sangheili.
 * Reliquary - A world designated by the Covenant as having a large amount of Forerunner artifacts.

Forerunner

 * Shield world - A series of artificial planets created by the Forerunners.