Planet
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Planets are celestial objects in the Milky Way galaxy. They are found in systems orbiting stars. Planets themselves are sometimes orbited by both natural satellites and artificial space stations. Cities are also often built on planetary surfaces.
Overview[edit]
Terraforming[edit]
- Main article: Terraforming
Terraforming is a series of processes to make planets suitable for habitation.[1] It can take several centuries to fully terraform an Earth-sized planet, depending on what is needed.[2] Humans first began terraforming around the 22nd-century in the Sol system.[3] The Covenant can terraform worlds solely to produce plasma.[4][5]The Flood could also terraform, by altering the atmosphere of worlds they touched.[6]
Slipspace affects[edit]
- Main article: Slipstream space
Planets can generate enough of a gravitational force that it can affect the superfine quantum filaments that are needed for slipspace drives; something UNSC calculations could not account for. Covenant drives, which originate from Forerunner drives were able to overcome this.[7]
Types[edit]
Physical[edit]
- Gas giant - Planets predominately composed of gases.[8][9] While the UNSC/UEG does not possess the ability to mine these worlds,[8] the Forerunners did.[10] Some of these gas giants were the anchor sites for Halo rings.[11][10]
- Ice giant - Ice giants are types of planets that are similar to gas giants. Substance and Haakuth are examples.[12][13]
- Ice world - Ice worlds are extremely cold, frigid. Snow and ice are common features. Kamchatka, Zehar VI, Strilun IV, and Balaho are examples.[14][15]
- Ocean world - Ocean worlds have large bodies of water on them. Terceira, Reme, and Beta Gabriel are examples.[16][17][18]
- Jungle world - Jungle worlds are largely composed of jungle environments. Actium was an example.[19]
- Desert world - A desert world is a planet primarily composed of deserts. The human colony of Carrow is an example.[19]
- Shield world - A series of artificial planets created by the Forerunners. Requiem, Onyx, and Genesis are examples.
Threshold, a gas giant.
Requiem, Shield 0001.
Carrow, a desert world.
Kamchatka, an ice world.
Substance, an ice giant.
Geopolitical[edit]
- Main articles: Human colonies, Covenant worlds
- Agriculture world - A world that's used by the Unified Earth Government to produce food for Earth and other colonies.[20]
- Cradle world - Cradle worlds are the origin worlds of a species.[21][22] This appears to be synonymous with the word homeworld.[23][24] These planets are sometimes highly developed and play important governmental roles.[23][21] For a list of homeworlds, see here.
- Reliquary - A world designated by the Covenant as having a large amount of Forerunner artifacts.[25]
