Editing NOVA bomb

{{Status|Canon}}
{{Weapon infobox
|manufacturer=[[UNSC]]
|type=Specialized [[nuclear weapon]]
|affiliation=[[United Nations Space Command]]
|ammotype=Nuclear warheads encased in [[lithium triteride]]
|operation=Multiple [[nuclear fusion]] explosives amplified by hardened case
|optics=
|range=Extremely large blast radius 
}}
{{Quote|This is the prototype NOVA bomb, nine [[fusion]] warheads encased in [[lithium triteride]] armor. When detonated, it compresses its fissionable material to neutron-star density, boosting the thermonuclear yield a hundredfold. I am [[Vice Admiral]] [[Danforth Whitcomb]], temporarily in command of the [[UNSC]] military base [[Reach]]. To the Covenant uglies that might be listening, you have a few seconds to pray to your damned heathen gods. You all have a nice day in hell...|[[Vice Admiral]] [[Danforth Whitcomb]]'s recording on the NOVA bomb, right before it is activated in the space adjacent to the planet [[Joyous Exultation]].}}

The '''NOVA bomb''' is a [[nuclear weapon|nuclear explosive device]] used by the [[United Nations Space Command]]. Described as "planet killers", NOVAs contain a very high-yield combination of nine nuclear fusion warheads, the explosive power of which is harnessed to compress additional [[Lithium triteride|lithium triteride]] fusionable material to astronomical densities and magnify the overall blast to titanic proportions.{{Ref/Novel|Id=FS19|FS|Chapter=19}} It is quite possibly the most destructive weapon utilized by either side in the [[Human-Covenant War]].
 
==Background==
The NOVA bomb is a cluster of nine nuclear fusion warheads, each encased in [[Wikipedia:lithium|lithium]] triteride armor. The casing serves as additional fusionable material to the initial nine warheads. When the nine fusion warheads are detonated, the lithium triteride casings are forced together in the center of the combined blast and subjected to massive levels of pressure and superheating,{{Ref/Reuse|FS19}} achieving "neutron star density" according to Vice Admiral [[Danforth Whitcomb]]. It is because of the energy released by the nuclear fusion of the additional material that the resulting detonation's yield is magnified a hundredfold over that of the nine warheads alone.{{Ref/Novel|Id=GoO27|GoO|Chapter=27}} The NOVA bomb carries an unprecedented payload for its size; the bombs are considered "planet killers" due to their destructive potential.{{Ref/Reuse|FS19}}

Originally intended for use against the Covenant in space,{{Ref/Reuse|FS19}} the NOVA bomb has been used in two known engagements: in orbit over the planet Joyous Exultation,{{Ref/Reuse|GoO27}} and on the surface of the planet [[Glyke]].{{Ref/Novel|Id=Env|Env}} In both cases, the effects were extreme. When the bomb was detonated above Joyous Exultation, it heated the planet's atmosphere, scorched one quarter of its surface and shattered a [[Malhiem|nearby moon]].{{Ref/Reuse|GoO27}} When detonated directly on a planet's surface—as was the case on Glyke—the explosion's power was enough to disrupt the planet's structure and overcome the binding energy of its gravity, turning it into a vast cloud of debris and killing every living thing in, on, and around the planet almost instantly.{{Ref/Reuse|Env}}

Any further detailed analysis on the full power of this bomb has yet to be mentioned, but it is known that it is the most destructive weapon in the UNSC's arsenal.

== History ==
It was intended for the NOVA bomb to be used in space against the [[Covenant]] [[Covenant fleet|fleet]] during the [[Fall of Reach]]. The remaining NOVA bombs were left on [[Reach]] and "re-purposed" by [[Admiral Whitcomb]]. His reasoning was that "''either the Covenant pack those bombs up and take them home for study, a possibility that I hope to God happens. A bomb like that could crack their homeworld in two. Or, the bombs stay here and they'll stop the Covenant on Reach...''"{{Ref/Reuse|FS19}}

The first documented triggering of a NOVA bomb occurred when it was accidentally detonated by a group of [[Huragok]] stationed on the [[Covenant supercarrier]] ''[[Sublime Transcendence]]''. Immediately after [[Kwassass]], a fellow crew member, deciphered Admiral Whitcomb's message, the Huragok, through their curiosity and frenzied obsession, fixed the circuitry of the bomb, detonating it despite Kwassass's attempts to stop them. The Huragok completed the detonation timer's circuit, which promptly resulted in its activation. The resulting explosion occurred between a Covenant outpost planet [[Joyous Exultation]] and its moon, [[Malhiem]], scorching half of the planet and shattering the moon. The resulting winds on Joyous Exultation flattened cities and spawned tidal waves. Radiation flooded the planet and killed everything living on it, penetrating the surface of the planet to its core. Every ship within the NOVA bomb's range, save for those on the opposite side of the planet, boiled and vaporized in an instant. The explosion was described as though "a star ignited between Joyous Exultation and its moon."{{Ref/Reuse|GoO27}}

The NOVA bomb explosion completely destroyed three-fifths of the fleet that was there, totaling over 300 ships. Eighteen [[Covenant destroyer|destroyers]], two [[Covenant cruiser|cruisers]], one [[Covenant carrier|carrier]] and the flagship ''[[Incorruptible]]'' escaped the NOVA bomb explosion due to a [[Slipspace]] jump ''en masse'' just moments prior to the explosion.{{Ref/Reuse|GoO27}} Other ships arrived at [[Onyx]] to reinforce the ''Incorruptible'' from Joyous Exultation, suggesting that they escaped the bomb's detonation as a result of being positioned on the opposite side of the planet.{{Ref/Novel|GoO|Chapter=38}}

During the [[Battle for Earth]], ONI initiated [[Operation: SUNSPEAR]] and forwarded a high priority message to the [[Spartan-II program|Spartans]] of [[Gray Team]], declaring "Condition: Endgame" under which they were to execute the detonation of a NOVA bomb on the surface of the Covenant colony world of [[Glyke]], a major military production center home to billions of [[Sangheili]]. Deploying from the {{UNSCShip|Vacuna}}, Gray Team made landfall and activated the warhead on the planet's surface. Once out of range the NOVA bomb was detonated, destroying the planet and all life on its surface. Gray Team was unaware that the war was over and [[Treaty of 2552|a tentative peace]] had been reached with the [[Swords of Sanghelios]], making the action no longer necessary. During the [[Carrow Conflict]] in [[2558]], Gray Team were left worried about being charged as [[war criminal]]s for their actions, but ONI offered them a deal which included a pardon from [[Thel 'Vadam]] for Glyke's destruction.{{Ref/Reuse|Env}}

During the [[Battle of Installation 05]], and the subsequent quarantine of the Installation and [[High Charity]], [[Cortana]] requested that UNSC [[UNSC High Command|HIGHCOM]] deploy a NOVA bomb around [[Installation 05]], to stop the outbreak of the [[Flood]], and ''High Charity'', in order to destroy the Covenant holy capital.{{Ref/Novel|GoO|Chapter=21}} However, it is apparent that this request was not granted, as High Charity was not bombed and later landed on [[Installation 00]].{{Ref/Level|H3|[[The Covenant (level)|The Covenant]]}} In addition, Installation 05 was [[Glassing|glassed]] by [[Covenant separatists|separatist]] [[Sangheili]] [[Fleet of Retribution|naval forces]] instead and had a research base established in orbit by July 2557.

== Theory ==
The NOVA bomb's explosive power is quickly depleted due to the lack of particles or atmosphere around it if detonated in space. This results in a much quicker release of energy (in the form of radiation and electromagnetic pulse) over a much wider area, with the possibility of even further multiplying its damage to ships, planets, moons, and other celestial objects which are not adequately shielded from these effects. However if detonated inside a planet's atmosphere, a portion of the total energy generated would be dispersed throughout the atmosphere in the form of a shock wave. The density as well as composition of the atmosphere are the largest contributing factors when determining how much energy is dispersed. Even though the EXACT power of the NOVA Bomb is not mentioned in the book, a low end can be calculated:

{{Conjecture}}
Assumptions: the moon is 2km, and the NOVA bomb is only 5,000 km away, in low orbit.

Calc: Apply the Inverse Squared Law: Source Energy / (4 * Pi * R<sup>2</sup>) the radius is the distance from the source to the range.

x/ (4 * 3.14195... * 5,000<sup>2</sup>) = 4 Megatons per square kilometer to fragment a 2km moon which requires 8 Megatons to be fragmented.

x = 1.2 Petatons - equivalent to 1.2 billion megatons

Some may find this yield hard to believe for a fusion device, even one as large as the NOVA, but the stated effects to the planet and nearby moon require explosive power of this magnitude. Whitcomb does mention, however, that the lithium triteride cases are compressed to "neutron star density" during the detonation, implying that the warheads themselves boost a second, much larger fusion reaction.

In Halo: Ghosts of Onyx, the detonation of the NOVA bomb was noted to have caused "300-kilometer-per-hour winds" to sweep over Joyous Exaultation. Using data from nuclear testing calculated for ideal shock fronts, if Joyous Exaultation had atmospheric pressures and elemental composition similar to that of Earth (highly likely, as it was a Covenant colony planet, with the majority of Covenant species breathing Earth-like atmospheres), a 300 kph wind velocity corresponds to a peak overpressure of 6 psi (31.4 kpa) and a peak dynamic pressure of 0.85 psi (5.9 kpa)

For comparative purposes, using the formula of yield equivalence for nuclear weapons, EMt = n * Y ^ (2/3), where "EMt" is the equivalent yield, "n" is the number of warheads, and "Y" is the actual yield of each individual weapon in megatons, the NOVA bomb has a yield equivalence of:

"Little Boy" -first atomic bomb, dropped on Hiroshima, Japan; Yield = ~15 kilotons

(1,200,000,000 Mt ^ (2/3)) / (.015 Mt ^ (2/3)) = 18,566,355

18,566,355 Hiroshima-style fission bombs

or

"Tsar Bomba" - largest nuclear weapon ever tested; Yield = ~50 megatons

(1,200,000,000 Mt ^ (2/3)) / (50 Mt ^ (2/3)) = 83,203

83,203 Tsar Bomba thermonuclear bombs.

Fireball radius = ~4204km
Blast radius = ~60000km

{{Conjecture end}}

== Trivia ==
*The NOVA bomb shares its name with a weapon mentioned in the novel ''[[Wikipedia:Starship Troopers|Starship Troopers]]'', wherein it is described as "being able to split a planet in half." It is likely that this inspired the Halo universe's own NOVA bomb. A superweapon by the name of "[[Wikipedia:Nova bomb (Andromeda)|Nova bomb]]" was also featured in the science fiction series ''[[Wikipedia:Andromeda (TV series)|Gene Roddenberry's Andromeda]]''. The 'Nova Bomb' is also the name of a super ability in [[Bungie]]'s ''Destiny'' franchise, that has the player launch a powerful explosive projectile at enemies.
*In ''[[Halo: First Strike]]'', [[Vice Admiral]] [[Danforth Whitcomb]] stated that the NOVA bomb on [[Reach]] had been activated on a timer. Though not stated, the bomb appears to have been disarmed at some point after its discovery, preventing it from going off until it was inadvertently reactivated during ''[[Halo: Ghosts of Onyx]]''.

==List of appearances==
*''[[Halo: First Strike]]'' {{Mo}}
*''[[Halo: Ghosts of Onyx]]'' {{1st}}
*''[[Halo: Envoy]]'' {{Mo}}
*''[[Halo: Outcasts]]'' {{Mo}}
*''[[Halo Infinite]]''
**''[[Season 05: Reckoning]]'' {{Mo}}

==Sources==
{{Ref/Sources}}

{{UNSC ordnance}}
[[Category:Nuclear weapons]]
[[Category:Bombs]]
[[Category:UNSC naval weapons]]