Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki
For the shuttlecraft, see Comet (USS Robinson).

The Icarus IV comet in 2266

A comet is a type of celestial body that is composed of rock and ice, and is usually found to be orbiting a star. If a comet orbits too close to a star, then the increased heat causes the comet's more volatile components to sublimate, shedding its mass, and creating a coma and/or "tail".

Like asteroids and meteors, comets were made of material left over from the formation of a solar system. (TOS - Star Trek Annual 1986 comic: "Star Facts 1")


Sometime after the events put in motion by Quinn in the 20th century (for his friend Maury Ginsberg, D.D.S.), the controversial Q was banished inside a comet until the 24th century. (VOY episode: "Death Wish")

In June 2151, the Earth starship Enterprise discovered the largest comet that had yet been discovered by Humans, and was named Archer's Comet after Enterprise captain, Jonathan Archer. (ENT episode: "Breaking the Ice"; TNG novel: A Time to Sow; ST reference: Star Charts)

In 2265, when Sanduy's Comet made its historic closest approach to the planet Nukolee, it triggered meteorite showers that expelled unidentified gases into the atmosphere, triggering random occurrences of madness among the population. (TOS comic: "A World Gone Mad")

In late 2266, the area near the Icarus IV comet was the focus of a battle between the ChR Gal Gath'thong and the Federation starship USS Enterprise. (TOS episode: "Balance of Terror"; TOS novel: The Return; CCG set: The Trouble with Tribbles)

Collecting samples from a comet’s tail

In 2267, Leonard McCoy and Montgomery Scott entered the tail of Sanduy's Comet in spacesuits to collect toxic gas samples. McCoy was inadvertently exposed, triggering two bouts of temporary madness. However, he was able to synthesize an antigen to the gases. (TOS comic: "A World Gone Mad")

A rogue comet passed through the Gamma Hydra system. The planet Gamma Hydra IV passed directly through the path of this comet, and residue from its tail was later discovered to contain radiation. In 2267, exposure to this radiation resulted in rapid aging among a science team on the planet’s surface and a landing party from the Enterprise. (TOS episode & novelization: The Deadly Years) The comet might have been Icarus IV, which was known to orbit that system. (ST reference: Star Charts)

The orbit of a Bajoran comet known as The Messenger brought it close to Bajor at 2,000-year intervals, producing volcanoes and widespread devastation to the planet's surface, and forcing Bajorans into caverns for their survival. In 2370, the comet returned. Jadzia Dax used the shields from three Runabouts to alter the comet's trajectory and prevent an apocalypse on Bajor. (DS9 comic: "Dax's Comet")


In 2371, a mining expedition from Pluto LaGrangian colonies discovered the battle-damaged USS Defiant frozen in a comet in the Oort cloud. It had been there for nearly 5,000 years. (DS9 - Invasion! novel: Time's Enemy)

In 2373, the USS Enterprise-E detected a class-2 comet while conducting a patrol of the Romulan Neutral Zone. (TNG movie: First Contact)

Throughout the seven seasons of "Star Trek: Deep Space Nine", a comet flies past at the start of the opening credits.



Galactic regions: quadrantsectorclusternebulastar system
System bodies: starplanetplanetoiddwarf planetasteroidmeteoroidcomet


External links