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{{Update Science}}[[Image:MutaraNebula.JPG|thumb|right|<center>Mutara Nebula]] :''You may be looking for the [[:Category:Nebulae|Category "Nebulae"]]'' A '''nebula''' is an interstellar cloud of [[matter]], usually gases (such as hydrogen) and dust. Many nebulae are [https://www.space.com/39935-stellar-nursery-unites-star-formation-theories.html stellar nurseries]. Nebulae (''this spelling being the plural'') were sometimes known as "interstellar dust clouds." Since [[sensor]]s and other systems function poorly in some nebulae, they have been known to be used by [[starship]]s to strategic advantage in conflicts. ==Nebula Classifications==[[File:Paulson Nebula.jpg|thumb|right|<center>Paulson Nebula]][[File:Planetary neb.jpg|thumb|right|<center>A planetary nebula]][[File:Proto neb.jpg|thumb|right|<center>Proto-nebula]][[FIle:Nursery.jpg|thumb|right|<center>A stellar nursery]] *'''Class 1''' - contains any amounts of protomatter*'''Class 2''' - the matter within is disruptive to the sensor arrays of Federation starships*'''Class 3''' - has a subspace vacuole near the center, which acts as a gravitational anchor for the surrounding gas*'''Class 9''' - has constituent compounds and elements that have sensor-deceiving properties*'''Class 11''' - consists mostly of oxygen and argon, with trace amounts of theta-xenon, fluorine, and sirillium*'''Class 17''' - contain hydrogen and helium, and can be similar to Class 11 with parts of sirillium*'''Class J''' - have deuterium (heavy hydrogen), and certain ionized gases that have potential to contain a warp core explosion*'''Class K''' - documented to contain helium and argon*'''Class T''' - roughly one-thousand kilometers in diameter, composed of hydrogen, helium, and argon; can contain planetoids (a type of stellar nursery)*'''Mutara class''' - term coined in order to classify nebulae similar to the [[Mutara Nebula]] ==Nebula Types==*'''Dark matter nebula''' - A gaseous accumulation of material in space, caused by uncharacteristically high concentrations of dark matter. <br>They could be extremely difficult to detect using conventional sensor technology. Can be illuminated using metreon particles or modified photon torpedoes *'''Dichromic nebula''' - Have intense gravimetric distortions. Dichromic acid (H2Cr2O7) is the fully-protonated form of the dichromate ion, <br>and both are powerful oxidizing agents. Dichromic acid leaves trace amounts of ions that can interfere with instruments used to observe and measure local magnetic fields. *'''Emission nebula''' - These nebula emit their own light, due to the presence of ultraviolet radiation from very hot, young stars inside. <br>Cloaking devices were useless inside emission nebulae. *'''Hydrogen cloud''' - Composed entirely or mostly of hydrogen molecules, the dominant hydrogen is mostly neutral, rather than ionized or molecular. *'''Inversion nebula''' - Made up of unstable plasma strands, Federation astro-theorists theorized that these nebulae were so unstable, <br>they would burn out within a few years, but the phenomenon had never been actually seen in the [[Alpha Quadrant]]. *'''Planetary nebula''' - Created by expelled matter of a star reaching the end of its life, also considered an ''emission nebula.'' *'''Proto-nebula''' - Newly-forming interstellar dust clouds, these nebulae sometimes had intense gravimetric forces, and could give off plasma surges. *'''Protostellar nebula''' - Contain high levels of particle flux, which prevent starships from staying inside for more than 72 hours <br>(though could also hide them from sensor scans). These are sometimes also called [[wikipedia:Protoplanetary nebula|Proto-planetary nebulae]]. *'''Stellar nursery''' - Where multiple stars are formed, perhaps not all at once, but during the same time period. <br>Intense ultraviolet light was often given off by the forming stars.
:''You may be looking for the {{ShipClass|Nebula}} of [[starship]].''
[[Image:MutaraNebula.JPG|thumb|Mutara Nebula]]
A '''nebula''' is an interstellar cloud of [[matter]], usually [[gas]]es (such as [[hydrogen]]) and dust. Many nebulae are [[stellar nursery|stellar nurseries]].
Since [[sensor]]s and other systems functioned poorly in some nebulae, they were often used by [[starship]]s to strategic advantage in conflicts.
[[Captain]] [[Rudolph Ransom|Ransom]] once hid from a [[Klingon Bird-of-Prey]] for three days in a nebula near [[Epsilon IV]].
While the {{USS|Voyager}} was undergoing a maintenance overhaul in [[2377]], the ''[[Delta Flyer II]]'' searched a nebula near [[Annari]] space for [[dilithium]].
Later that year, a ship crewed by [[Hirogen]] [[Iden's Rebellion|prey holograms]], led by [[Iden]], hid from two Hirogen {{ShipClass|Venatic}} hunting vessels inside a nebula. In response, the [[Unnamed Hirogen|Hirogen Alpha]] ordered one of his ships to circle the nebula, while the other entered it to drive the [[hologram]]s out. Iden eventually left the nebula on his own to "liberate" three holograms on a nearby [[Nuu'Bari]] vessel.
When the ''Voyager'' crew was forced to abandon ship due to [[tetryon radiation]] from a [[subspace mine]] in [[2377]], [[the Doctor]], as the [[ECH]], took the ship into a nebula to escape [[Quarren (species)|Quarren]] marauders.
== Nebula classification ==
* [[Class 1 nebula|Class 1]]
* [[Class 2 nebula|Class 2]]
* [[Class 3 nebula|Class 3]]
* [[class 9 nebula|Class 9]]
* [[Class 11 nebula|Class 11]]
* [[Class 17 nebula|Class 17]]
* [[Class J nebula|Class J]]
* [[Class K nebula|Class K]]
* [[Class T nebula|Class T]]
* [[Mutara class]]
== Nebula types ==
* [[Dark nebula]]
* {{MA|Dark_matter_nebula|Dark matter nebula}}
* [[Dichromatic nebula]]
* [[Emission nebula]]
* [[Inversion nebula]]
* [[Micro-nebula]]
* [[Planetary nebula]]
* [[Proto-nebula]]
* [[Protostellar nebula]]
* [[Reflection nebula]]
* [[Stellar nursery]]
== See also ==
* [[:Category:Nebulae]]
* [[Nucleogenic cloud being]]
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[[Category:Nebulae]]
[[category: science]]
