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{{Era|Forerunner|HCW|Post}}
{{Status|Canon}}
[[File:Milky-Way-labeled.jpg|thumb|right|300px|The Sagittarius Arm is named for its proximity to the [[Wikipedia:Sagittarius (constellation)|Sagittarius]] constellation when viewed from [[Earth]].]]
[[File:Milky-Way-labeled.jpg|thumb|300px|The Sagittarius Arm is named for its proximity to the [[Wikipedia:Sagittarius (constellation)|Sagittarius]] constellation when viewed from [[Earth]].]]
The '''Sagittarius Arm''' is a minor [[Wikipedia:Spiral_galaxy#Spiral_arms|spiral arm]] of the [[Milky Way galaxy]].{{Ref/Reuse|HW1213}} It lies between the [[Wikipedia:Scutum–Centaurus Arm|Scutum–Centaurus Arm]] further toward the galactic core and the [[Wikipedia:Perseus Arm|Persus Arm]] further toward the outer rim. The [[Orion Arm]], or Orion Spur, branches off from the Sagittarius Arm.{{Ref/Reuse|HW1213}}{{Ref/Reuse|HEPJC}}
The '''Sagittarius Arm''' is a minor [[Wikipedia:Spiral_galaxy#Spiral_arms|spiral arm]] of the [[Milky Way galaxy]].{{Ref/Reuse|HW1213}} It lies between the [[Wikipedia:Scutum–Centaurus Arm|Scutum–Centaurus Arm]] further toward the galactic core and the [[Wikipedia:Perseus Arm|Persus Arm]] further toward the outer rim. The [[Orion Arm]], or Orion Spur, branches off from the Sagittarius Arm.{{Ref/Reuse|HW1213}}{{Ref/Reuse|HEPJC}}


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The Milky Way's Sagittarius Arm was explored by the [[Forerunner]]s thousands of years ago and at least one [[shield world]], designated [[Shield World 10021|10021]], was constructed under the direction of [[Warrior-Servant]]s in a distal star system of this arm.{{Ref/Reuse|HW1213}} Prior to the [[Great Purification|firing]] of the [[Halo Array]] in [[97,445 BCE]], the [[Halo ring|rings]] known as [[Installation 01]] and [[Installation 07]] were transported from the [[Intergalactic space|extragalactic]] [[Installation 00]] to points in the Sagittarius Arm.<ref name="HW1213">''[[Halo Warfleet]]'', ''pages 12-13''</ref> Installation 01 was placed at the Array's Beta position distal to the offshoot of the Orion Spur and Installation 07 was placed at the Zeta position, proximal to Orion.{{Ref/Reuse|HW1213}} It was from these locations that Beta Halo and Zeta Halo killed every unprotected life form with even the most rudimentary of [[Wikipedia:Nervous system|nervous system]]s within twenty-five thousand [[Wikipedia:Light-Year|light-year]]s of each.<ref name="ENC184">''[[Halo Encyclopedia (2009 edition)]]'', ''page 184''</ref><ref name="HCETB">''[[Halo: Combat Evolved]]'', ''[[Two Betrayals]]''</ref>
The Milky Way's Sagittarius Arm was explored by the [[Forerunner]]s thousands of years ago and at least one [[shield world]], designated [[Shield World 10021|10021]], was constructed under the direction of [[Warrior-Servant]]s in a distal star system of this arm.{{Ref/Reuse|HW1213}} Prior to the [[Great Purification|firing]] of the [[Halo Array]] in [[97,445 BCE]], the [[Halo ring|rings]] known as [[Installation 01]] and [[Installation 07]] were transported from the [[Intergalactic space|extragalactic]] [[Installation 00]] to points in the Sagittarius Arm.<ref name="HW1213">''[[Halo Warfleet]]'', ''pages 12-13''</ref> Installation 01 was placed at the Array's Beta position distal to the offshoot of the Orion Spur and Installation 07 was placed at the Zeta position, proximal to Orion.{{Ref/Reuse|HW1213}} It was from these locations that Beta Halo and Zeta Halo killed every unprotected life form with even the most rudimentary of [[Wikipedia:Nervous system|nervous system]]s within twenty-five thousand [[Wikipedia:Light-Year|light-year]]s of each.<ref name="ENC184">''[[Halo Encyclopedia (2009 edition)]]'', ''page 184''</ref><ref name="HCETB">''[[Halo: Combat Evolved]]'', ''[[Two Betrayals]]''</ref>


Following a large [[2543]] [[Battle of Psi Serpentis|battle]] in the [[Psi Serpentis system]] between [[UNSC]] [[Battle Group India]] and two [[Covenant]] fleets, scattered reports of independent [[human]] forces fighting the Covenant began to pop up on the outer edge of what the [[Office of Naval Intelligence]] believed to be nonsanctioned human [[Human colonies|colonized]] space.{{Ref/Reuse|HEPJC}} These reports tracked toward the Sagittarius side of the Orion Spur.<ref name="HEPJC">''[[Halo: Evolutions]]'', ''[[The Impossible Life and the Possible Death of Preston J. Cole]]''</ref> Following the end of the [[Human-Covenant War|war]] between the Covenant and humanity, Installation 07 was discovered by humans a few years after the war and before long the UNSC [[Zeta Halo project|dispatched]] of researchers to study it.<ref>''[[Halo: Hunters in the Dark]]''</ref>
Following a large [[2543]] [[Battle of Psi Serpentis|battle]] in the [[Psi Serpentis system]] between [[UNSC]] [[Battle Group India]] and two [[Covenant]] fleets, scattered reports of independent [[human]] forces fighting the Covenant began to pop up on the outer edge of what the [[Office of Naval Intelligence]] believed to be nonsanctioned human [[Human colonies|colonized]] space.{{Ref/Reuse|HEPJC}} These reports tracked toward the Sagittarius side of the Orion Spur.<ref name="HEPJC">''[[Halo: Evolutions]]'', ''[[The Impossible Life and the Possible Death of Preston J. Cole]]''</ref> Following the end of the [[Human-Covenant War|war]] between the Covenant and humanity, Installation 07 was discovered by humans a few years after the war and before long the UNSC [[Zeta Halo project|dispatched]] researchers to study it.<ref>''[[Halo: Hunters in the Dark]]''</ref>


==Locations==
==Locations==
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==Gallery==
==Gallery==
<GALLERY>
<gallery>
File:H5G - Milky Way.png|The Covenant was evidently familiar with a number of locations in the Sagittarius Arm.<ref name="H5GT">''[[Halo 5: Guardians]]'', ''[[Truth (level)|Truth]]''</ref>
File:H5G - Milky Way.png|The Covenant was evidently familiar with a number of locations in the Sagittarius Arm.<ref name="H5GT">''[[Halo 5: Guardians]]'', ''[[Truth (level)|Truth]]''</ref>
</GALLERY>
</gallery>


==List of appearances==
==List of appearances==

Latest revision as of 11:38, April 12, 2023

The Sagittarius Arm is named for its proximity to the Sagittarius constellation when viewed from Earth.

The Sagittarius Arm is a minor spiral arm of the Milky Way galaxy.[1] It lies between the Scutum–Centaurus Arm further toward the galactic core and the Persus Arm further toward the outer rim. The Orion Arm, or Orion Spur, branches off from the Sagittarius Arm.[1][2]

History[edit]

The Milky Way's Sagittarius Arm was explored by the Forerunners thousands of years ago and at least one shield world, designated 10021, was constructed under the direction of Warrior-Servants in a distal star system of this arm.[1] Prior to the firing of the Halo Array in 97,445 BCE, the rings known as Installation 01 and Installation 07 were transported from the extragalactic Installation 00 to points in the Sagittarius Arm.[1] Installation 01 was placed at the Array's Beta position distal to the offshoot of the Orion Spur and Installation 07 was placed at the Zeta position, proximal to Orion.[1] It was from these locations that Beta Halo and Zeta Halo killed every unprotected life form with even the most rudimentary of nervous systems within twenty-five thousand light-years of each.[3][4]

Following a large 2543 battle in the Psi Serpentis system between UNSC Battle Group India and two Covenant fleets, scattered reports of independent human forces fighting the Covenant began to pop up on the outer edge of what the Office of Naval Intelligence believed to be nonsanctioned human colonized space.[2] These reports tracked toward the Sagittarius side of the Orion Spur.[2] Following the end of the war between the Covenant and humanity, Installation 07 was discovered by humans a few years after the war and before long the UNSC dispatched researchers to study it.[5]

Locations[edit]

The Sagittarius Arm holds a number of Forerunner constructions. Proximal to the Orion Spur lies Installation 07.[1] Shield World 10021 can be found just beyond the Orion-Sagittarius junction and further beyond it is Installation 01.[1][Note 1]

Gallery[edit]

  • The Covenant was evidently familiar with a number of locations in the Sagittarius Arm.[6]

    The Covenant was evidently familiar with a number of locations in the Sagittarius Arm.[6]

List of appearances[edit]

Notes[edit]

  1. ^ A galaxy map featured in Halo: Warfleet places Shield World 006 within the Sagittarius Arm. This is considered a liberty for the sake of visual presentation, as the Zeta Doradus system—which houses the shield world—is located well within the Orion Arm a mere 38 light-years from Earth.

Sources[edit]

  1. ^ a b c d e f g Halo Warfleet, pages 12-13
  2. ^ a b c Halo: Evolutions, The Impossible Life and the Possible Death of Preston J. Cole
  3. ^ Halo Encyclopedia (2009 edition), page 184
  4. ^ Halo: Combat Evolved, Two Betrayals
  5. ^ Halo: Hunters in the Dark
  6. ^ Halo 5: Guardians, Truth
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