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A '''Supernova''' (plural: supernovae or supernovas) is a stellar explosion. They are extremely luminous and cause a burst of [[radiation]] that may briefly outshine an entire [[Milky Way|galaxy]] before fading from view over several weeks or months. During this short interval, a supernova can radiate as much energy as the [[Sol|Sun]] could emit over its life span. The explosion expels much or all of a star's material at a velocity of up to a tenth the speed of light, driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant.<ref>[[Wikipedia:Supernova|Wikipedia]]</ref>
[[File:Requiem destruction.png|thumb|275px|[[Epoloch system|Epoloch]] goes supernova after consuming Requiem.]]
A '''supernova''' (plural: ''supernovae'' or ''supernovas'') is a stellar explosion. They are extremely luminous and cause a burst of [[radiation]] that may briefly outshine an entire [[Milky Way|galaxy]] before fading from view over several weeks or months. During this short interval, a supernova can radiate as much energy as the [[Sol system|Sun]] could emit over its life span. The explosion expels much or all of a star's material at a velocity of up to a tenth the speed of light, driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant.<ref>[[Wikipedia:Supernova|'''Wikipedia''': ''Supernova'']]</ref>


On average, supernovae occur about once every 50 years in a galaxy the size of the [[Milky Way]] and play a significant role in enriching the interstellar medium with heavy elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.
On average, supernovae occur about once every 50 years in a galaxy the size of the [[Milky Way]] and play a significant role in enriching the interstellar medium with heavy elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.


==History==
Before their extinction at the hands of [[the Flood]], and the [[Halo Array]], the Forerunner fleet had "the capacity to force premature stellar collapse," creating an artificial supernova, used to destroy entire star systems taken by the Flood.<ref>''[[Terminals]]'', Second Terminal</ref>
In early [[Forerunner]] history, the Forerunners attempted to manipulate several stars in their [[Orion complex|region of space]]. They subsequently failed and caused several stars to supernova, leaving their [[Ghibalb|homeworld]] heavily irradiated and uninhabitable.<ref>'''[[Halo: Cryptum]]''', ''page 222''</ref>


Before their defeat at the hands of the [[Flood]], and the firing of the [[Halo Array]], the Forerunner fleet had "the capacity to force premature stellar collapse," creating an artificial supernova, used to destroy entire star systems taken by the Flood.<ref>'''[[Halo 3]]''', ''[[Terminal (Halo 3)|Terminal 2]]''</ref>
==Halo Wars==
 
In the [[Battle of the Apex]] in [[2531]], The [[UNSC]] moved the {{UNSCShip|Spirit of Fire}}'s [[Shaw-Fujikawa Translight Engine|FTL Reactor]] into [[The Apex]] site of the [[Shield World (Halo Wars)|unnamed Shield World]] and detonated it close to the star. The chain-reaction sent the [[Shield World]]'s sun into supernova state, obliterating the installation and the fleet of [[Unnamed Forerunner Starship|Forerunner Ships]], preventing the [[Covenant]] from using it and saving [[Human|humanity]] from total defeat and extinction.
According to the [[San'Shyuum]], a supernova destroyed the species' homeworld, [[Janjur Qom]], in [[648 BCE]].<ref>'''[[Halo Encyclopedia (2009 edition)]]''', ''page 113''</ref> However, many members of the [[Covenant]] doubted this claim.<ref>[https://www.halowaypoint.com/en-us/universe/locations/janjur-qom '''Halo Waypoint''': ''Janjur Qom'']</ref>
 
During the [[Battle of Trove]] in [[2531]], Professor [[Ellen Anders]] came up with a plan to destroy the [[shield world]] and its fleet of [[Forerunner]] {{Class|Sojourner|dreadnought}}s by taking the FTL reactor of the {{UNSCShip|Spirit of Fire}} and detonating it inside the installation's internal star. This would cause the star to go supernova and obliterate the shield world.<ref>'''[[Halo Wars]]''', campaign level ''[[Reactor (Halo Wars level)|Reactor]]''</ref> Due to damage sustained during an attack by Covenant forces, Sergeant [[John Forge]] was forced to take the reactor into the star and detonate it manually. As the ''Spirit of Fire'' escaped the shield world, the internal star went supernova, destroying the planet and the Forerunner fleet, thwarting the Covenant plan.<ref>'''[[Halo Wars]]''', campaign level ''[[Escape (Halo Wars level)|Escape]]''</ref><ref>'''[[Halo Wars]]''', cutscene [http://www.youtube.com/watch?v=Rw449I95UHY&feature=player_embedded "One Less Sun in The Universe"]</ref> A debris field persisted until [[2557]] when a massive UNSC fleet destroyed the debris with a massive bombardment of [[nuclear weapon]]s.<ref>'''[[Halo: Renegades]]'''</ref>
 
In [[2552]], Spartan [[John-117]] destroyed Halo [[Installation 04]] by detonating the fusion reactors of the crashed {{UNSCShip|Pillar of Autumn}}.<ref>'''[[Halo: Combat Evolved]]''', campaign level ''[[The Maw]]''</ref> The explosion created supernova-like temperatures and created a new element on the [[Alpha Shard]], a fragment of the installation that was propelled through [[slipspace]] to orbit a red giant. This new element was fatal to humans and was turned into a [[bioweapon]] by [[terrorist]]s. After the source of the new element was traced to Alpha Shard following the [[terrorist attack on Sedra City]], Private [[Talitha Macer]] correctly surmised that the supernova effects of the destruction of Installation 04 created it, confirmed by the lack of the element anywhere else in the known universe. [[Mission to Alpha Shard|A joint mission]] by an [[ONI]]-[[Sedran Colonial Guard]] team destroyed the deposits of this new element with a [[HAVOK tactical nuclear weapon]].<ref>'''[[Halo: Nightfall]]'''</ref>
 
At the close of the [[Requiem Campaign]] in [[2558]], the leader of [[Jul 'Mdama's Covenant|a Covenant remnant]], [[Jul 'Mdama]], put the shield world [[Requiem]] on a collision course with the system's sun, [[Epoloch]]. When the shield world was absorbed by the sun, the star went into a supernova state and exploded, nearly destroying the {{UNSCShip|Infinity}} which narrowly escaped the shockwave into slipspace.<ref>'''[[Spartan Ops]]''', [[S1/Exodus|S1E10 ''Exodus'']]</ref>
 
==Trivia==
*The destruction of two [[Forerunner]] [[shield world]]s involved a supernova. [[Trove]] was destroyed when the {{UNSCShip|Spirit of Fire}}'s FTL reactor was used to cause the internal sun to go supernova while the destruction of [[Requiem]] in its sun [[Epoloch system|Epoloch]] caused Epoloch to go supernova.
 
==List of appearances==
*''[[Halo 3]]''
**''[[Terminal (Halo 3)|Terminals]]'' {{Fm}}
*''[[Halo Wars]]'' {{1st}}
*''[[Halo: Cryptum]]'' {{Mo}}
*''[[Halo 4]]''
**''[[Spartan Ops]]''
*''[[Halo: Silentium]]'' {{Mo}}
*''[[Halo: Escalation]]''
*''[[Halo: Nightfall]]'' {{Mo}}
*''[[Halo: Smoke and Shadow]]'' {{Mo}}
*''[[Halo: Renegades]]'' {{c|Referenced only}}
 
==Gallery==
<gallery>
File:SN1987a debris evolution animation.gif|Animation of Supernova 1987a, showing the apex of the explosion, subsequent dissipation of the stellar remnant and buildup of ejecta within the debris ring. Note that this entire sequence takes place over a 15-year period.
</gallery>


==Sources==
==Sources==
{{Ref/Sources}}
<references/>
 
[[Category:Astronomy]]
[[Category:Astronomy]]
[[Category:Physics]]
[[Category:Physics]]

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