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A collapsar is a type of neutron star that compresses into a quantum singularity.

History and specifics[]

During its final phase, a collapsar begins to swell in size, producing increasing quantities of neutronium and gravimetric stress. At a certain point, overwhelming gravity forces itself to collapse inward, blasting away its neutronium and emitting X-ray bursts until it becomes a black hole.

In 2371, the crew of the Oberth-class USS Tenebrae observed the star FGC-27 transition from a collapsar into a black hole. Science officer Wyv Srri accurately predicted that it would collapse in six days. The final stage took ten hours, during which FGC-27 illuminated the surrounding Mar Oscura dark matter nebula with an orange-blow glow. A unique stream of particle emissions were detected — fleeing non-corporeal Umbra, lifeforms that lived within the star who were able to inhabit the bodies of several of the crew. (Last Unicorn RPG module: Planetary Adventures mission: "On the Edge of Night")

In the 2370s, Collapsar 49 in the Arteline sector was used as a sensor test site for the shakedown cruise of the Nebula-class USS Discovery under Captain Ann Potrikos. En route, the ship's warp engines would not disengage, leaving the crew with 30 minutes to avoid destruction. (Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book mission: "Shakedown Cruise")


  • Collapsar 49
  • FGC-27



Stellar classification
By class and type class O blue-violet starclass B blue starclass A blue-white starclass F white star (white dwarf) • class G yellow star (yellow dwarfyellow giant) • class K orange star (orange giant) • class M red star (red dwarfred giant) • boson starbrown dwarfgreen starN-type starR-type starS-type starD-type star
By size or makeup black hole/black starcarbon stardwarf star (brown dwarfred dwarfwhite dwarfyellow dwarf) • giant star (blue giantred giantorange giantyellow giant) • Lazarus starmicrostarneutron star (collapsarmagnetarpulsar) • protostarsupergiant starvariable starwhite holeWolf-Rayet star


External links[]