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There is more information available on this subject at Jupiter on the English Wikipedia.
Jupiter uprising.jpg
A Covenant battle group and the Forerunner Dreadnought seen in the proximity of Jupiter


Sol system[1][2]



Orbital position:

Fifth planet[2]


At least four; Io, Europa, Callisto, Ganymede[1][2]





Unified Earth Government


Jupiter is a gas giant and the fifth planet in the Sol system. It is the second largest body in the system, behind Sol itself but ahead of Saturn.[2]


Human scientists have studied Jupiter's winds to learn about the formation of storms. The gas giant's intense radiation, planetary ring system, and orbital path have also been analyzed by scientists to help them explain other mysteries in the galaxy.[2]

Jupiter is orbited by a number of natural satellites, referred to as the Jovian Moons.[4][5] At least four—Europa, Ganymede, Io, and Callisto—have been colonized by humanity.[1][2] Jupiter is also orbited by the Jovian Habitats which include Juventus and Bellona[3] as well as the shipyards for Martian Metals Shipyards.[6]


Rise of humanity[edit]

Humans began colonizing Jupiter's moons in 2080.[5][7] The planet itself was settled by gas mining operations and industrial habitats.[1][Note 1] Many of the satellite habitats were founded to serve as waystations for resource extraction further out in the solar system.[3]

In 2160, the Frieden secessionist movement attacked the UN Colonial Advisors stationed on Io. The attack led to the Jovian Moons Campaign, which was one of the conflicts that culminated in the Interplanetary War.[8]

The planet of Concord in the Alabaster system would become of interest to settlement co-ops based in the Jovian holdings.[9]

Human-Covenant War[edit]

During the Human-Covenant War, Jupiter was once again a location of particular importance.[10] On October 20, 2552, the High Prophet of Regret's Fleet of Sacred Consecration exited slipstream space relatively close to Jupiter.[11] Io Station detected the Covenant fleet of fifteen ships and reported the discovery to Fleet Admiral Lord Terrence Hood a few moments before the Battle for Earth.[12]

Later, around November 15–16, 2552,[Note 2] the Forerunner Dreadnought and an escorting fleet of the High Prophet of Truth passed Jupiter while on their way to Earth at the time John-117 commandeered a Karo'etba-pattern Ghost and crashed it into a large number of Covenant troops.[13] Believing the Spartan to be dead, the Prophet of Truth orders the crew of the Forerunner Dreadnought to jump further in-system and enter Earth's atmosphere on November 17, 2552.[14] Following the Covenant's invasion across the Sol system, many habitats of Jovian colonies survived the Covenant assault largely unscathed.[15]


List of appearances[edit]


  1. ^ In the Halo Encyclopedia: The Definitive Guide to the Halo Universe when discussing Jupiter directly on pages 294-295, it specifically mentions that humanity does not possess the ability to mine gas giants and thus Jupiter is left alone. Mythos changes this and is displayed instead.
  2. ^ See Battle for Earth's Notes section


  1. ^ a b c d e Halo Mythos - The Interplanetary War, page 50-51
  2. ^ a b c d e f g Halo Encyclopedia (2011 edition) - Locations: The Sol System, page 294-295
  3. ^ a b c Halo Encyclopedia (2022 edition), page 40-41
  4. ^ Halo Mythos - Rise of Humanity, page 46-47
  5. ^ a b Halo Encyclopedia (2011 edition) - Timeline: 1969 CE-2492 CE, page 32-33
  6. ^ Halo Encyclopedia (2022 edition), page 127
  7. ^ Halo: Contact Harvest, page 37
  8. ^, Halo Storyline: (Additional copy on HBO Forums) (Retrieved on Apr 24, 2008) [local archive] [external archive]
  9. ^ Halo Encyclopedia (2022 edition), page 44
  10. ^ Halo: The Fall of Reach, ??
  11. ^ Halo 2: Anniversary, Terminal 15
  12. ^ Halo 2, campaign level Cairo Station
  13. ^ Halo: Uprising, issue #1
  14. ^ YouTube, Halo 101: Long Road Home (Retrieved on Jun 14, 2021) [archive]
  15. ^ Halo Waypoint, Humans (Retrieved on Jun 1, 2020) [archive]