In compiling the list I stuck strictly to those places established as existing planets. This has led to a few judgement calls - for instance in Star Trek II Khan says he will chase Kirk "round the moons of Nibea...", but given the context (a modified Moby Dick quote) I think there's a strong possibility that Nibea is fictional so it isn't included. I was tempted to add some references which can be inferred from species names - i.e. in Voyager's "Retrospect" we meet the Entharans, a species which trades heavily with other races. This is generally a fairly conclusive proof that their home planet would be called Enthara. However, we do know that there are species in Trek whose name does not in fact come from their planet - Humans don't come from the planet Huma! So I have not made assumptions like this.

These kinds of decisions have led to about 70 candidates being missed out from this list, and many of these are likely to be actual planets. But I did want this list to be as canonical as is possible.

I've always found Trek species and planet naming conventions to be a little disappointing. It's a shame that the writers seem so locked into naming almost every species after their planet; worse still, there are times when both the star, planet, and species all have the same name. Even the Bajorans come from a Planet called Bajor which orbits the star Bajor! Rather like having Humans being called Solians from the planet Sol in the Sol system.

Any corrections or additions to this list will be gratefully appreciated, but please stick to canonical sources only - by which I mean the aforementioned films and live action episodes. No TAS, Tech Manuals, etc please. If you want your update to be speedily incorporated I need a planet name, the episode it comes from, and if possible a rough idea of where it's mentioned in the episode. Anyway... here's the list.
 
 

Name	Description	Series	Episode
892 IV	Home of a modern version of the Roman civilisation	TOS	"Bread And Circuses"
Acamar III	Home of the Acamarians and Gatherers	TNG	"The Vengeance Factor"
Adelphous IV	Planet the Enterprise-D was heading for in 2367	TNG	"Data's Day"
Adigeon Prime	Site of a genetic engineering facility when Bashir was enhanced as a child	DS9	"Dr. Bashir, I Presume"
Ajilon Prime	In the Arkanus Sector; site of a battle between Klingons and Federation forces in 2373	DS9	"Nor the Battle To the Strong"
Akritiri	Delta Quadrant Planet	VOY	"The Chute"
Alastria	Approximately 40 000 lightyears from Sikarus; famed for the erosine winds	VOY	"Prime Factors"
Aldea	Planet thought to be fictional until it revealed itself to the Enterprise- D	TNG	"When the Bough Breaks"
Alpha 117	Class M planet which becomes exceptionally cold during the nighttime; Kirk was split into two halves here.	TOS	"The Enemy Within"
Alpha 441	Planetoid in the Badlands	VOY	"Dreadnought"
Alpha Carinae II	Class M, used in M-5 test.	TOS	"The Ultimate Computer"
Alpha Carinae V	Planet where the Drella lived, a creature which derived sustenance from emotions	TOS	"Wolf in the Fold"
Alpha Cygnus IX	Planet where Sarek arranged an important treaty	TNG	"Sarek"
Alpha III	Planet where an important human rights document was signed	TOS	"Court Martial"
Alpha Majoris I	Home planet of the Mellitus, a being of many forms	TOS	"Wolf in the Fold"
Alpha Moon	One of the moons of Peliar Zel	TNG	"The Host"
Alpha Onias III	Planet where Riker was abducted by an alien child	TNG	"Future Imperfect"
Alpha Proxima II	Several women where stated as being murdered here.	TOS	"Wolf in the Fold"
Alpha V	Colony world; Home to relatives of Charlie Evans	TOS	"Charlie X"
Altair III	William Riker refused to allow Captain De Soto to beam down to this planet	TNG	"Encounter At Farpoint"
Altair IV	Federation world; home to Dr. Roget	DS9	"Prophet Motive"
Altair VI	Visited by the Enterprise in 2267, used in the Kobyashi Maru test	TOS	"Amok Time"; Star Trek II : The Wrath of Khan
Altec	Member of the Coalition of Madena Along with Straleb	TNG	"The Outrageous Okona"
Amleth Prime	Cardassian planet located inside an emission nebula	DS9	"Return To Grace"
Andevian II	Planet with at least four moons	DS9	"Return To Grace"
Andoria	Home of the Andorian people	DS9	"Prophet Motive"
Angel One	Planet ruled by women	TNG	"Angel One"
Angosia III	Planet which modified its citizens to become the perfect soldiers, then mistreated them afterwards	TNG	"The Hunted"
Antede III	Home to intelligent species of piscines	TNG	"Manhunt"
Antica	Home of the Anticans	TNG	"Lonely Among Us"
Antos IV	Planet where Captain Garth had cellular metamorphosis	TOS	"Whom Gods Destroy", "Who Mourns for Adonis"
AR-558	Site of Dominion Communications relay	DS9	"The Siege of A R-558"
Archanis IV	Planet claimed by the Klingons	DS9	"Broken Link"
Archer IV	Planet the Enterprise headed for after encountering the Bozeman	TNG	"Yesterday's Enterprise"
Arcybite	Planet where a Ferengi took over mining refineries	DS9	"The Nagus"
Ardana	Location of the cloud city, Stratos	TOS	"The Cloud Minders"
Argelius II	Planet dedicated to hedonism	TOS	"Wolf in the Fold"
Argratha	Gamma Quadrant world, home of the Argrathi	DS9	"Hard Time"
Ariannus	Vital transfer point; infected by a bacterial plague in 2268	TOS	"Let That Be Your Last Battlefield"
Arkaria	Site of Arkeria base home of the Remmler Array	TNG	"Starship Mine"
Armus IX	Planet where Riker wore a native costume made of leather	TNG	"Angel One"
Arvada III	Planet where a disaster killed many people	TNG	The Arsenal of Freedom"
Aschelan V	Location of a Cardassian fuel depot	VOY	"Dreadnought"
Atalia VII	Site of a diplomatic conference in 2369	TNG	"The Chase"
Athos IV	Fog-bound world on the edge of the Badlands	DS9	"Blaze of Glory"
Atrea IV	Planet which suffered unexplained magma cooling around 2370	TNG	"Inheritance"
audet IX	Location of a Federation medical station	TNG	"The Child"; Star Trek : Encyclopedia
Axanar	Planet that James Kirk once visited on a peace mission	TOS	"Whom Gods Destroy"
Babel	Planet on which a conference was held concerning Coridans entry to the Federation	TOS	"Journey to Babel"
Bajor	Closest inhabited world to the Wormhole. Rotational period of 26 Earth hours, 5 or more moons	DS9	various
Bajor VIII	Six colonies	DS9	"Past Prologue"
Balosnee VI	Planet where the harmonies of the tides causes hallucinations	DS9	"The Nagus"
Barisa Prime	Federation settlement	DS9	"The Adversary"
Barkon IV	Planet where a Federation deep space probe crashed	TNG	"Thine Own Self"
Barradas III	Class M planet with many archeological ruins	TNG	"Gambit, part I"
Barson II	Site of a medical emergency in 2370	TNG	"Eye of the Beholder"
Barzan II	Planet located near the Barzan Wormhole	TNG	"The Price"
Beltain IX	Commercial shipping center	TNG	"Coming of Age"
Benecia	Benecia Colony	TOS	"The Conscience of the King"; "Turnabout Intruder"
Benthos	Homeworld to the Benthans	VOY	"Vis a Vis"
Benzar	Homeworld of the Benzite people	TNG	"Coming of Age"
Berengaria VII	Planet where dragons live	TOS	"This Side of Paradise"
Bersallis III	Planet which suffers large firestorms every seven years	TNG	"Lessons"
Beta Agni II	Experienced tricyanate contamination	TNG	"The Most Toys"
Beta Antares IV	Imaginary cardgame Fizzbin was played here according to Kirk	TOS	"A Piece of the Action"
Beta III	Sophisticated computer controlled the society here. Kirk destroyed it.	TOS	"The Return of the Archons"
Beta Kupsic	The Enterprise D was due to visit here in 2365	TNG	"The Icarus Factor"
Beta Moon	Moon of Peliar Zel, at war with Alpha Moon	TNG	"The Host"
Beta Thoridar	Klingon planet used as a base by the Duras forces	TNG	"Redemption"
Beta VI	Destination of the Enterprise when it encountered Trelane	TOS	"The Squire of Gothos"
Beta XII-A	Planet on which the Enterprise captured Kang	TOS	"The Day of the Dove"
Betazed	Home of Betazoids; taken By Dominion forces during the war	DS9	"In the Pale Moonlight"
Beth Delta I	Dr. Stubbs wished he could take Deanna Troi here for champagne	TNG	"Evolution"
Bilana III	approximately three lightyears from Layma II	TNG	"New Ground"
Blue Horizon	Terraformed By Gideon Seyetik	DS9	"Second Sight"
Bolarus IX	Homeworld of the Bolian people	TNG	"Allegiance"
Bolias	planetary Bank robbed	DS9	"Who Mourns for Morn?"
Bopak III	uninhabited; six weeks Away from nearest Dominion outpost	DS9	"Hippocratic Oath"
Boraal II	atmosphere Dissipated	TNG	"Homeward"
Boreal III	Home of a transport attacked by the Crystalline Entity	TNG	"Silicon Avatar"
Boreth	Klingon monastery	DS9	"The Way of the Warrior"
Borka VI	Troi was abducted by Romulans from this planet	TNG	"Face of the Enemy"
Bracas V	LaForge took a vacation here and went skin-diving	TNG	"The Loss"
Brax	Q is known as "The God of Lies" on this planet	DS9	"Q- Less"
Bre'el IV	A moon was knocked out of orbit, threatening planetary destruction	TNG	"Deja Q"
Brekka	Home of the Brekkians	TNG	"Symbiosis"
Brentalia	Planet used as a zoo for endangered species	TNG	"New Ground"
Bringloid V	Site of an Irish colony	TNG	"Up the Long Ladder"
Browda IV	Planet being terraformed in 2366	TNG	"Allegiance"
Bryma	In the DMZ	DS9	"The Maquis, part 2"
Bynaus	Home of Bynars	TNG	"11001001"
Cairn	Species name, not necessarily planet name	TNG	"Dark Page"
Calder II	Federation archaeological outpost raided by mercenaries	TNG	"Gambit, Part I"
Caldik Prime	Fifth planet In Its system	VOY	"Caretaker"
Caldos	Caldos Colony	TNG	"Sub Rosa"
Caldos IV	One of the first Terraforming projects the Federation undertook	TNG	"Sub Rosa"
Camor V	Jason Vigo settled here with his mother	TNG	"Bloodlines"
Camus II	Janice Lester exchanged bodies with Captain Kirk here	TOS	"Turnabout Intruder"
Canopus planet	Where Tarbolde wrote "Nightingale Woman"	TOS	"Where No Man Has Gone Before"
Capella IV	Home planet of the Capellan warriors	TOS	"Friday's Child"
Cardassia	Homeworld of the Cardassians	TNG	"The Chase"
Cardassia III	Planet in the Cardassia system	DS9	"Prophet Motive"
Cardassia IV	Planet in the Cardassia system	DS9	"The Homecoming"
Cardassia Prime	Planet in the Cardassia system	DS9	"The Wire"
Cardassia V	Planet in the Cardassia system	DS9	"Shadowplay"
Carema III	Considered as a site for the partial mining system	TNG	"The Quality of Life"
Casperia Prime	Ringed resort planet known as an important vacation spot in the Hovarian cluster	DS9	"Change of Heart"
Castal I	Site of conflict between the Talarians and the Federation	TNG	"Suddenly Human"
Catualla	Home of Tango Rab, follower of Dr. Sevrin	TOS	"The Way to Eden"
Celtris III	Planet in Cardassian space	TNG	"Chain of Command, Part I"
Cerebus II	Planet where Mark Jameson obtained a de-aging drug	TNG	"Too Short A Season"
Cestus III	On the far side of the Federation; 2 week delay for subspace messages	TOS	"Arena"
Ceti Alpha V	Planet where Kirk abandoned Khan	TOS	"Space Seed"
Ceti Alpha VI	Exploded six months after Khan was abandoned on Ceti Alpha V	Star Trek II : The Wrath of Khan
Chalna	Home of the Chalnoth civilisation	TNG	"Allegiance"
Chaltok IV	Romulan research Colony	VOY	"Time And Again"
Chandra V	Planet where Tam Elbrun was assigned	TNG	"Tin Man"
Chantil III	Home of a mythical hunter named Darmok	TNG	"Darmok"
Cheron	Planet whose society destroyed itself over racial hatreds	TOS	"Let That Be Your Last Battlefield"
Chrysalia	From species name Chrysalians - not certain?	TNG	"The Price"
Cirrus IV	Famed for its emerald wading pools	TNG	"Conundrum"
Coltar IV	Suffered a time distortion in 2364	TNG	"We'll Always Have Paris"
Cor Caroli V	Suffered from the Phyrox plague	TNG	"Allegiance"
Coridan	Petitioned for Federation entry in 2267	TOS	"Journey to Babel"
Corinth IV	Location of star fleet facility	TOS	"The Man Trap"
Corvan II	Atmospheric pollutants threatened life on this planet	TNG	"New Ground"
Cygnet XIV	Dominated by women. The Enterprise computer underwent a refit here	TOS	"Tomorrow is Yesterday"
Cygnia Minor	Earth Colony threatened by famine	TOS	"Consciene of the King"
Daled IV	Permanently half in daylight, half in night time	TNG	"The Dauphin"
Danula II	Picard won the Starfleet academy marathon here	TNG	"The Best of Both Worlds Part II"
Daran V	Planet in the path of Yonada	TOS	"For the World is Hollow and I Have Touched the Sky"
Davlos III	On the Klingon Border	DS9	"Visionary"
Davlos Prime	Site of special "Care Center"	DS9	"Time's Orphan"
Dayos IV	Kang found one of the Albinos wives here	DS9	"Blood Oath"
Decos Prime	Site of a Federation base	DS9	"Treachery, Faith, And the Great River"
Dedestris	Planet in the delta quadrant	VOY	"Prime Factors"
Deinonychus VII	The Enterprise D waited for the supply ship Vico here	TNG	"A Fistful of Datas"
Delb II	Home of Nellen Tore, assistant to Admiral Satie	TNG	"The Drumhead"
Delinia II	Planet where transporter psychosis was first discovered	TNG	"Relm of Fear"
Delios VII	Home to the Karis Tribe	VOY	"Sacred Ground"
Delos IV	Dr. Crusher completed her internship here	TNG	"Remember Me"
Delta IV	Home of the Deltan people	Star Trek : The Motion Picture
Delta Rana IV	Delta Rana IV, Delta Rana	TNG	"The Survivors"
Delta Vega	Desolate planet with an automated Lithium mining station on it	TOS	"Where No Man Has Gone Before"
Deneb II	Kesla murdered several women here	TOS	"Wolf In the Fold"
Deneb IV	Planet inhabited by the Bandii	TNG	"Encounter At Farpoint"
Deneb V	Harcourt Fenton Mudd illegally sold the rights to a Vulcan fuel synthesiser here	TOS	"I, Mudd"
Deneva	Infested by the Denevan neural parasites in 2267	TOS	"Operation - Annihilate!"
Denius III	Artifacts found here showed the location of Iconia	TNG	"Contagion"
Deriben V	Aquiel Uhnari's last posting prior to Relay Station 47	TNG	"Aquiel"
Derna	Bajor's fourth moon	DS9	"Image In the Sand"
Dessica II	Picard was "murdered" in a bar on this planet	TNG	"Gambit, Part I"
Devidia II	Place where inhabitants raided Earth's past to harvest neural energy	TNG	"Time's Arrow"
Dimorus	Planet where Gary Mitchell saved Kirk from poison darts thrown by rodent creatures	TOS	"Where no Man Has Gone Before"
Donatu V	Site of an inconclusive battle between the Federation and Klingons	TOS	"The Trouble with Tribbles"
Doraf I	Planet where the Enterprise assisted with terraforming efforts	TNG	"Unification: Part I"
Dorvan V	Near the Cardassian border	TNG	"Journey's End"
Dozaria	Class M world with hot, desertlike climate	DS9	"Indiscretion"
Draken IV	TNG "Face of the Enemy"	TNG	"Gambit, Part I"
Drayan II	Several moons	VOY	"Innocence"
Draygo IV	Within three lightyears of Cardassian space	TNG	"Homeward"
Draylon II	Near Celfala Prime	DS9	"Sanctuary"
Drema IV	Suffered violent geologic instabilities as a result of dilithium deposits	TNG	"Pen Pals"
Dreon VII	Near the Badlands	DS9	"For the Cause"
Dulisian IV	Sent a distress call in 2368	TNG	"Unification: Part II"
Durenia IV	Destination of Enterprise-D in 2367	TNT	"Remember Me"
Dytallix B	Owned by the Dytallix mining corporation	TNG	"Conspiracy"
Earth	Mostly Harmless	Star Trek
Eden	Planet thought to be a perfect paradise - actually highly poisonous	TOS	"The Way to Eden"
Ekos	Planet turned into a copy of the Nazi state by Federation sociologist John Gill	TOS	"Patterns of Force"
El-Adrel IV	Planet where the Tamarians met the Enterprise D	TNG	"Darmok"
Elas	Inner planet of the Tellun star system	TOS	"Elaan of Troyius"
Elba II	Penal colony for the Federations criminally insane	TOS	"Whom Gods Destroy"
Emila II	Enterprise D visited here after Tanuga IV	TNG	"A Matter of Perspective"
Eminiar VII	Fought a computer war with Vendikar for five hundred years	TOS	"A Taste of Armageddon"
Enara	D Q	VOY	"Remember"
Enara Prime	Home world of the Anarans	VOY	"Remember"
Ennan VI	Pulaski obtained a bottle of ale here	TNG	"Time Squared"
Epsilon Canaris III	On the verge of war - negotiations assigned to Commissioned Hedford	TOS	"Metamorphosis"
Epsilon Hydra VII	Vash was banned from the Royal Museum here	DS9	"Q- Less"
Erabus Prime	Planet where Q saved Vash when she was stung by an insect	DS9	"Q-Less"
Errikang VII	Q almost got Vash killed here	DS9	"Q- Less"
Evadne IV	Destination of Enterprise-D after it encountered an unstable wormhole	TNG	"Clues"
Excalbia	Inhospitable volcanic planet where the Excalbians investigated good and evil	TOS	"The Savage Curtain"
Exo III	Dead planet where Dr. Korby discovered sophisticated androids	TOS	"What Are Little Girls Made Of?"
Fahleena III	A Valerian vessel visited here with supplies	DS9	"Dramatis Personae"
Farius Prime	Destination of Galador freighter	DS9	"Honor Among Thieves"
Fendaus V	Led by a family whose members have no limbs	TNG	"Loud as a Whisper"
Ferenginar	Ferengi Homeworld,	DS9	"Family Business"
Fina Prime	Location of an outbreak of the Vidiian phage	VOY	"Lifesigns"
Finnea Prime	Non Federation world	DS9	"A Simple Investigation"
Folnar III	Origin of the Folnar jewel plant	TNG	"Dark Page"
Forcas III	Worf attended a Bat'Leth competition here in 2370	TNG	"Parallels"
Forlat III	Site of an attach by the crystalline entity	TNG	"Silicon Avatar"
Free Haven	Bajoran Colony	DS9	"To the Death"
Gagarin IV	Location of Darwin Genetic Research station	TNG	"Unnatural Selection"
Gaia	Home of Defiant crew descendants in an alternate timeline	DS9	"Children of Time"
Galador II	Homeworld of the Galador freighters	DS9	"The Maquis, Part I"
Galdonterre	Former hiding place of the Albino	DS9	"Blood Oath"
Galen IV	Federation Colony	TNG	"Suddenly Human"
Galor IV	Holds Annex of the Daystrom Institute	TNG	"The Offspring"
Galorda Prime	In 2372 a Klingon civilian transport crashed here, killing all aboard	DS9	"Rules of Engagement"
Galorndon Core	Federation space	TNG	"The Enemy", "Unification 2"
Galvin V	A marriage here is only considered successful if offspring result within one year	TNG	"Data's Day"
Gamelan V	Experienced increase in atmospheric radiation in 2367	TNG	"Final Mission"
Gamma Hromi II	Near a gatherer camp	TNG	"The Vengeance Factor"
Gamma Hydra IV	Entire population of a Federation science colony died of apparent old age here	TOS	"The Deadly Years"
Gamma II	Destination of the Enterprise when some officers were taken to Triskelion	TOS	"The Gamesters of Triskelion"
Gamma Tauri IV	Ferengi stole a T-9 energy converter from here	TNG	"The Last Outpost"
Gamma Trianguli VI	Tropical class M planet ruled by a computer called Vaal. Kirk destroyed it.	TOS	"The Apple"
Gamma Vertis IV	Planet where the entire population is mute	TOS	"The Empath"
Ganalda IV	Klingon forces retreated from here in 2373	DS9	"Nor the Battle To the Strong"
Garon II	Visited by the Starship Wellington	TNG	"Ensign Ro"
Gaspar VII	Homeworld of Captain Edwell	TNG	"Starship Mine"
Gault	Worf grew up on this farm world	DS9	"Let He Who Is Without Sin..." TNG "Heart of Glory"
Gema IV	Planet in the Delta Quadrant controlled by the Kazon Nistrim	VOY	"Basics, Part I"
Gemaris V	Captain Picard mediated a difficult trade dispute here	TNG	"Captain's Holiday"
Gemulon V	Original destination of the SS Santa Maria	DS9	"Paradise"
Genesis	Mutara Sector, Destroyed	Star Trek III : The Search for Spock
Ghorusda	Planet	TNG	"Tin Man"
Gideon	Planet suffering from massive overpopulation	TOS	"The Mark of Gideon"
Golana	Bajoran Colony; Arrived At the "turn of the Century"	DS9	"Time's Orphan"
Gonal IV	Home of swarming moths	TNG	"Disaster"
Gothos	Planet created by Trelaine	TOS	"The Squire of Gothos"
Gravesworld	Home of Ira Graves, noted scientist	TNG	"The Schizoid Man"
Hakton VII	In the Demilitarised Zone	DS9	"The Maquis, Part II"
Halii	Home of Lieutenant Aquiel Uhnari	TNG	"Aquiel"
Hanon IV	Planet in the Delta Quadrant	VOY	"Basics"
Hansen's Planet	Home to creatures similar to Taurus II	TOS	"The Galileo Seven"
Harod IV	The Enterprise-D picked up some stranded miners here	TNG	"The Perfect Mate"
Harrakis V	Visited by the Enterprise-D in 2367	TNG	"Clues"
H'atoria	Klingon Colony near Border of Klingon And Federation space	TNG	"All Good Things..."
Haven	Beautiful planet thought by some to have mystical healing powers	TNG	"Haven"
Hekaras II	Planet in the Hekaras corridor	TNG	"Force of Nature"
Hell	Unofficial nickname. High levels of trigenic vapors and EM Disturbances	VOY	"Parturition"
Hemikek	Planet in a yellow dwarf system	VOY	"Investigations"
Hemikek IV	Delta Quadrant planet	VOY	"Lifesigns"
Heva VII	Site of a refueling depot in the Delta Quadrant	VOY	"The Chute"
Hoek IV	A planet where San Palo relics can be viewed	DS9	"Q- Less"
Holberg 917G	Planet owned by Flint	TOS	"Requiem for Methuselah"
Holna IV	Planet rich in Minzinite	DS9	"Statistical Probabilities"
Hurada III	Visited by telepathic historians led by Tarmin	TNG	"Violations"
Hurkos III	Devinoni Ral moved here at age 19	TNG	"The Price"
Hur'Q Planet	Class M world in the Gamma Quadrant	DS9	"The Sword of Kahless"
Iadara	Home of the Iadara Colony	TNG	"Parallels"
Iconia	Home of a legendary Iconian Empire	TNG	"Contagion"
Icor IX	Site of astrophysics center	TNG	"Captain's Holiday"
Ilari	Planet in the Delta Quadrant	VOY	"Warlord"
Ilidaria	Planet in the Delta Quadrant	VOY	"Parallax"
Inavar Prime	Planet in the Delta Quadrant	VOY	"Survival Instinct"
Indri VIII	Biosphere Destroyed	TNG	"The Chase"
Inferna Prime	Planet which is eight days travel from DS9	DS9	"The Ascent"
Ingraham B	Struck by Denevan neural parasite	TOS	"Operation: Annihilate!"
Invernia II	Bashir's father was stationed there	DS9	"Melora"
Itamish III	Sisko family camp site.	DS9	"The Jem'Hadar"
Ivor Prime	Federation world; destroyed by the Borg	Star Trek : First Contact
Iyaaran Homeworld	Noted for it's spectacular crystal formations	TNG	"Liasions"
Janus VI	Home of the Horta species	TOS	"Devil In the Dark"
Japori II	Planet	DS9	"Improbable Cause"
Jaros II	Planet where Ro Laren was imprisoned by Star Fleet	TNG	"Ensine Ro"
Jeraddo	Fifth moon of Bajor. Formerly Class M, now uninhabitable After Energy tapping	DS9	"Progress"
Jouret IV	New Providence colony was destroyed by the Borg here	TNG	"The Best of Both Worlds"
Juhraya	Federation Colony near Cardassian border	TNG	"Premtive Strike"
Jupiter	Sol V	DS9	"Starship Down"
Kaelon II	This star was used in experiments to reinitiate fusion	TNG	"Half a Life"
Kalandan Outpost	Artificial Planet manufactured by the Kalandan people	TOS	"That Which Survives"
Kaldra IV	Destination of a group of Ulian researchers	TNG	"Violations"
Kalla III	Duras sisters conducted illegal mining here	TNG	"Firstborn"
Kataan	Planet dead for 1,000 years	TNG	"Inner Light"
Kavis Alpha IV	Became the home of the Nanites	TNG	"Evolution"
Kea IV	Topic of research paper presented by Picard	TNG	"The Chase"
Kelva	Planet in Andromeda, home of the Kelvan Empire	TOS	"By Any Other Name"
Kenda II	Home of Dr. Dalen Quaice	TNG	"Remember Me"
Kentanna	A mystical planet briefly thought to be Bajor	DS9	"Sanctuary"
Kesprytt III	Planet where Picard and Crusher were kidnapped	TNG	"Attached"
Kessik IV	Third planet in its system	VOY	"Faces"
Khefka IV	Homeworld to Mareel	DS9	"Invasive Procedures"
Khitomer	Site of important peace conferences between the Federation and Klingon Empire	Star Trek VI : The Undiscovered Country
Khofla II	Home of Ferengi business man Plegg	DS9	"The Alternate"
Klaestron IV	Homeworld to Ilon Tandro	DS9	"Dax"
Klavdia III	Salia was raised here to ensure her neutrality in the war on her homeworld	TNG	"The Dauphin"
Kora II	Cardassian planet, site of a military academy	DS9	"Duet"
Korma	In Cardassian space	DS9	"Return To Grace"
Kostolain	Homeworld of Minster Camio, fiancee of Lwaxana Troi	TNG	"Cost of Living"
Kotati	Planet in the Delta Quadrant	VOY	"Investigations"
Kraus IV	Planet where Garak obtained silk lingerie	DS9	"Past Prologue"
Krios	Krios system. At war with Vault until Enterprise hosted a peace conference	TNG	"The Mind's Eye"
Ktaria VII	V'naree homeworld	VOY	"Emanations"
Kurill Prime	The original homeworld of the Vorta	DS9	"The Jem' Hadar"
Kurl	Kerlan civilization died out 12 000 years ago	TNG	"The Chase"
Kyana Prime	Krenim colony erased from time	VOY	"Year of Hell"
Kylata II	Class M planet in the Gamma Quadrant	DS9	"Meridian"
Lambda Paz	Moon of Pentarus III	TNG	"Final Mission"
Lamenda Prime	Planet near Cardassia	DS9	"The Homecoming"
Landris II	Doctor Mowray conducted archeological research here	TNG	"Lessons"
Largo V	A shipment of Tamen Sahsheer was bound for here	DS9	"Babel"
La'voti V	Delta Quadrant planet, visited by Voyager	VOY	"Nothing Human"
Lazon II	Planet near Cardassia	DS9	"Defiant"
Ledonia III	Dax bought a planet on this planet	DS9	"The Wire"
Legara IV	Home of the Lagarans	TNG	"Sarek"
Lemma II	Approximately three lightyears from Bilana III	TNG	"New Ground"
Levinius V	Planet hit by the Denavan neural parasites in 2247	TOS	"Operation Annihilate!"
Ligobis X	Planet where Gideon Seyetik's painting where displayed	DS9	"Second Sight"
Ligon II	Home of the Ligonians, who value honor above all else	TNG	"Code of Honor"
Ligos VII	Ligos system	TNG	"Rascals"
Lissepia	Homeworld of the Lissepian people	DS9	"Indiscretion"
Loren III	Loren system	TNG	"The Chase"
Loval	Civilian outpost, site of subspace relay station; site of secret weapons research installation	DS9	"Return To Grace"
L-S VI	Gamma Quadrant, located six lightyears from wormhole	DS9	"The Alternate"
Lunar V	Moon of Angosia III	TNG	"The Hunted"
Lysia	Lysian system	TNG	"Conundrum"
M-113	Home of the Salt Vampire	TOS	"The Man Trap"
Mab-Bu VI	Class M moon	TNG	"Power Play"
Makus III	The Enterprise was to deliver medical supplies here	TOS	"The Galileo Seven"
Malaya IV	Paul Hickman had a physical exam here	TNG	"Identity Crisis"
Malcor III	Over 2000 lightyears from Earth; home of a species which has almost developed warp technology	TNG	"First Contact"
Malkus IX	Inhabitants developed writing before sign language	TNG	"Loud as a Whisper"
Malon Prime	Malon homeworld	VOY	"Juggernaut"
Manark IV	Home of the sandbats	TOS	"The Empath"
Manu III	Government used proximity detectors	TNG	"Legacy"
Maranga IV	Worf attended the Klingon Kot'baval festival in 2370	TNG	"Firstborn"
Marcos XII	Chosen by the evil Gorgan to conquer	TOS	"And the Children Shall Lead"
Marejaretus VI	Homeworld to the Ooolans	TNG	"Manhunt"
Mariah IV	Visited by Valerian ship when delivering supplies	DS9	"Dramatis Personae"
Marijne VII	Gas Giant	TNG	"Interface"
Mariposa	In the Phyecus Sector; site of Irish colony	TNG	"Up The Long Ladder"
Marlonia	Visited by the Enterprise-D in 2369	TNG	"Rascals"
Mars	Sol IV; colonized by Earth in 2103	VOY	"The 37's"
Marva IV	Class M planet in the Badlands	DS9	"For the Uniform"
Mataline II	Neela Daren bought a flexible piano there	TNG	"Lessons"
Mavala IV	Noonien Soong married Juliana O'Donnell	TNG	"Inheritance"
Meezan IV	Bashir attended a burn treatment conference here	DS9	"In Purgatory's Shadow"
Meldrar I	Lunar prison	DS9	"Necessary Evil"
Meles II	Moriarti considered going here	TNG	"Ship in a Bottle"
Melina II	Visited by Tarmin and his group of telepathic historians	TNG	"Violations"
Melnos IV	planet where Neela Daren studied a plasma geyser	TNG	"Lessons"
Melona IV	Stripped of life by crystalline entity	TNG	"Silicon Avatar"
Memory Alpha	Site of the Federation library	TOS	"The Lights of Zetar"
Merak II	Planet ravaged by a botanical plague	TOS	"The Cloudminders"
Meridian	Triala system?	DS9	"Meridian"
Merik III	Planet in the Gamma Quadrant	DS9	"Hippocratic Oath"
Midos V	Planet where Dr Korby planned to make androids	TOS	"What are Little Girls Made of"
Mikah	Planet in the Delta Quadrant; visited by the USS Voyager	VOY	"Unforgettable"
Milika III	A young Picard rescued an Ambassador from here	TNG	"Tapestry"
Mimas	Moon of Saturn	TNG	"The First Duty"
Minara II	Used by the Vians	TOS	"The Empath"
Minos	A major arms production center	TNG	"The Arsenal of Freedom"
Minos Korva	Federation planet	TNG	"Chain of Command II"
Mintaka III	Home of a Proto-Vulcan culture	TNG	"Who Watches the Watchers"
Miridian VI	Barash claimed to have been captured by Romulans here	TNG	"Future Imperfect"
Mislen	Delta Quadrant planet in yellow dwarf system	VOY	"The Swarm"
Mithren	Planet in the Delta Quadrant	VOY	"Investigations"
Mizar II	Homeworld of the Mizarians	TNG	"Allegiance"
M'kemas III	In the Tzenkethi territory	DS9	"The Adversary"
Moab IV	Moab system	TNG	"The Masterpiece Society"
Monac IV	Site of Dominion shipyards destroyed in Jadzias name to ensure her entry into Sto'vo'kor	DS9	"Image in the Sand"
Moon	Earth's only natural satellite	Star Trek : First Contact
Mordan IV	Endured a forty year civil war after Mark Jameson delivered advanced weapons	TNG	"Too Short a Season"
Morikin VII	Cadet Picard was assigned here for training	TNG	"Tapestry"
Morska	Klingon Planet with subspace listening post	Star Trek : VI The Final Frontier
Mudd	Class K planet inhabited by androids	TOS	"I, Mudd"
Mudor V	The Enterprise-D hit a series of quantum filaments after leaving here	TNG	"Disaster"
Myrmidon	Vash was wanted for theft here	DS9	"Q- Less"
Nahmi IV	Outbreak of Correllium fever in 2366	TNG	"Hollow Pursuits"
Napimme	In the delta quadrant	VOY	"Learning Curve"
Narendra III	Site of the loss of the Enterprise C	TNG	"Yesterday's Enterprise"
Nasreldine	Enterprise-D crew member caught the flu here	TNG	"The Icarus Factor"
Nelvana III	Nelvana system	TNG	"The Defector"
Nervala IV	Nervala IV	TNG	"Second Chances"
New Bajor	Gamma Quadrant - same as the Crossover one?	DS9	"The Jem' Hadar"
New Gaul	Miranda Vigo was born here	TNG	"Bloodlines"
New Halana	Terraformed by Professor Gideon Seyetik	DS9	"Second Sight"
Nimbus III	"The Planet of Galactic Peace"- a failure. In the Neutral Zone.	Star Trek V : The Final Frontier
Ninipia Prime	Famed for its dancing girls	VOY	"Vis A Vis"
Nivoch	Planet	VOY	"Prime Factors"
No'nat	Klingon planet where the right of MajQa is practiced	TNG	"Rightful Heir"
Norcadia Prime	Norcadia system. Next to Pendari System. Theta Class; 260 million inhabitants; binary suns.	VOY	"Tsunkatse"
Norpin V	Retirement colony	TNG	"Rascals"
Nyria III	Nyrian system	VOY	"Displaced"
Oceanus IV	Oceanus IV	TNG	"The Game"
Ogus II	The Enterprise-D crew took shore leave here in 2367	TNG	"Brothers"
Ohniaka III	Ohniaka system	TNG	"Descent"
Omega IV	Almost wiped out by a bacteriological war	TOS	"The Omega Glory"
Omekla III	Obsidian Order shipyards located here	DS9	"Defiant"
Omicron Ceti III	Bombarded by Berthold rays; site of a failed colony	TOS	"This Side of Paradise"
Omicron IV	Earthlike planet almost destroyed by nuclear weapons	TOS	"Assignment: Earth"
Omicron Theta	Where Data was built	TNG	"Datalore"
Ophiucus III	Harcourt Fenton Mudd planned to sell some women as wives here	TOS	"Mudd's Women"
Orelius IX	Asteroidal planetoid	TNG	"Booby Trap"
Organia	Home of the Organians, non-corporeal beings who ended the Federation Klingon war	TOS	"Errand of Mercy"
Orias III	In the Orias system	DS9	"Defiant"
Ornara	Dala system	TNG	"Symbiosis"
Osinar VI	Planet	DS9	"Life Support"
Otar II	Destination of the Enterprise-D following the death of Lal	TNG	"The Offspring"
Pacifica	Ocean world	TNG	"Conspiracy"
Panora	In the Demilitarised Zone	DS9	"For the Uniform"
Parada II	Paradas system	DS9	"Whispers"
Parada IV	Planet with seven moons	DS9	"Whispers"
Parliament	Beta Renna system?	TNG	"Lonely Among Us"
Parsion III	Planet	DS9	"Business as Usual"
Peliar Zel	Planet whose two moons warred on one another	TNG	"The Host"
Pelleus V	The Enterprise-D was scheduled to visit in 2364	TNG	"11001001"
Pendari	Next to Norcadian System	VOY	"Tsunkatse"
Pendi II	Home of a trader who supplied information to the marquis	TNG	"Premtive Stike"
Pentarus II	Shuttle Nenbeck was thought to have crashed here	TNG	"Final Mission"
Pentarus V	Planet which petitioned Picard to mediate a labour dispute	TNG	"Final Mission"
Penthara IV	Planet the Enterprise saved from ecological disaster while being investigated by a time traveler	TNG	"A Matter of Time"
Penthath III	Worf destroyed a Klingon transport ship during a battle here	DS9	"Rules of Engagement"
Persephone V	Home planet of Admiral Jameson	TNG	"Too Short a Season"
Planet Q	The home of the scientist Thomas Leighton	TOS	"Conscience of the King"
Platonius	Home of the Platonians	TOS	"Plato's Stepchildren"
Pluto	Sol IX	Star Trek : Generations
Pollux IV	Greek god Apollo tried to recruit Kirk as a worshipper here.	TOS	"Who Mourns for Adonais?"
Pollux V	In the Beta Geminorum system	TOS	"Who Mourns for Adonis"
Portas V	Breen System, Demilitarised Zone	DS9	"For the Uniform"
Potak III	In the Delta Quadrant	VOY	"Partuition"
Prakal II	Guinan acquired an unusual drink here	TNG	"In Theory"
Praxis	Klingon moon; largely destroyed in accident caused by overmining	Star Trek VI : The Final Frontier
Prema II	Delta Quadrant; Talaxian mining colony	VOY	"Basics, Part I"
Prophet's Landing	Bajoran colony nearest Cardassian border	DS9	"Heart of Stone"
Psi 2000	The Enterprise was nearly destroyed here	TOS	"The Naked Time"
Pullock V	Site of the first off-planet raid by the Bajoran resistance	DS9	"Shakaar"
Pyris VII	Korob and Sylvia captured several Enterprise crew members here	TOS	"Catspaw"
Pythro V	Planet	DS9	"Rivals"
Qo'noS	Pronounced "Kronos"	Star Trek VI : The Final Frontier; DS9 "The House of Quark"
Quadra Sigma III	Sigma Three system	TNG	"Hide And Q"
Qualor II	Site of a Federation surplus depot	TNG	"Unification: Part I"
Quatal Prime	In the Demilitarised Zone. At least four moons; attacked by biogenic weapon	DS9	"For the Uniform"
Quazulu VIII	Several Enterprise-D Students became ill here	TNG	"Angel One"
Rakal	At least four moons	DS9	"Return To Grace"
Rakhar	Gamma Quadrant	DS9	"Vortex"
Rakosa V	Gamma Quadrant; Class M	VOY	"Dreadnought"
Ramatis III	Ramatis III, Ramatis	TNG	"Loud as a Whisper"
Ramura	Tracer homeworld	VOY	"Unforgettable"
Regula	Mutara Sector; Class D - "Essentially a great rock in space".	Star Trek II : The Wrath of Khan
Regulus III	Science Academy; over 300 lightyears from Deep Space Nine	DS9	"Fascination"
Regulus V	Home planet of the giant eel birds	TOS	"Amok Time"
Rekag-Seronia	Planet, site of bitter hostilities affecting Federation shipping	TNG	"Man of the People"
Relva VII	Location of a Starfleet base	TNG	"Coming of Age"
Remmil VI	Buildings are constructed of Crystalline webbing here	DS9	"Heart of Stone"
Remus	One of the homeworlds of the Romulan star empire	TOS	"Balance of Terror"
Rigel II	McCoy met two scantily clad women here	TOS	"Shore Leave"
Rigel IV	Pergium ore processing facility	TOS	"Wolf in the Fold"; DS9 "Prodigal Daughter"
Rigel V	Planet where a drug to increase blood product was tested	TOS	"Journey to Babel"
Rigel VII	Several Enterprise crew members were killed here	TOS	"The Cage"
Rigel XII	Site of a Lithium crystal mining operation	TOS	"Mudd's Women"
Rinax	Colonized moon of Talax; 300 000 died in the metreon cascade	VOY	"Jetrel"
Risa	Planet famed as one of the galaxies great vacation spots. Site of the most elaborate climate control system in the Federation	TNG	"Captain's Holiday"
Rivos V	Delta Quadrant	VOY	"Think Tank"
Rochanie III	Kurzon Dax and Sisko were cornered by Kaleans here	DS9	"Dramatis Personae"
Romulus	Capital world of the Romulan Empire	TOS	"Balance of Terror"
Ronara	In the DMZ	TNG	"Preemptive Strike"
Rousseau V	Astroidal planetoid	TNG	"The Dauphin"
Ruah IV	Supports a type of proto Humanoid	TNG	"The Chase"
Rubicun III	Planet where the Edo live	TNG	"Justice"
Rujian	Planet	DS9	"A Man Alone"
Rura Penthe	Frozen moon, site of Klingon forced labour camp	Star Trek : VI The Final Frontier
Rutia IV	Planet where terrorists kidnapped Dr. Crusher and Captain Picard	TNG	"The High Ground"
Sakura Prime	Planet in the Alpha Quadrant	VOY	"Dreadnought"
Salinia Prime	Delta Quadrant. Class M	VOY	"Warhead"
Saltok IV	Planet	DS9	"The Maquis, Part I"
Salva II	In the Demilitarised Zone. Cardassian colony in treaty signing.	DS9	"For the Uniform"
Sargon's Planet	World destroyed centuries ago by war leaving a small number of survivors stored underground	TOS	"Return to Tomorrow"
Sarona VIII	Enterprise-D destination before going on to Vandor IX	TNG	"We'll Always Have Paris"
Sarpeidon	Beta Niobe system. Destroyed when sun went nova	TOS	"All Our Yesterdays"
Sarthong V	Famous archeological ruins	TNG	"Captain's Holiday"
Saturn	Sol IV, ringed planet	TNG	"The First Duty"
Scalos	Planet whose inhabitants lived at a highly accelerated pace	TOS	"Wink of an Eye"
Secarus IV	The albino's hideout in 2345	DS9	"Blood Oath"
Selay	Homeworld to reptile people	TNG	"Lonely Among Us"
Sentinel Minor IV	Destination of the USS Lalo before they where destroyed by the Borg	TNG	"The Best of Both Worlds I"
Seros	Delta Quadrant	VOY	"Revulsion"
Setlik III	Site of a Cardassian invasion	TNG	"The Wounded", DS9 "Emissary"
Sha Ka Ree	Aka - Vorta' Vor, Sha Ka Ree, Etc. Lies At Center of Galaxy Beyond Great Barrier	Star Trek V : The Final Frontier
Sherman's Planet	World disputed by the Federation and Klingons. The Federation had the stronger claim	TOS	"The Trouble with Tribbles"
Shiralea VI	Location of the Parallax colony	TNG	"Cost of Living"
Sigma Draconis III	Class M Planet equivalent to Earth 1485 development	TOS	"Spock's Brain"
Sigma Draconis IV	Class M Planet equivalent to Earth 2030 development	TOS	"Spock's Brain"
Sigma Draconis VI	Class M Planet where Spock's brain was taken	TOS	"Spock's Brain"
Sigma Iotia II	Planet whose inhabitants mimicked Earth mobsters	TOS	"A Piece of the Action"
Sikaris	Approximately 40 000 light-years from Alastria; mantle of tetrahedral quartz 20 km thick	VOY	"Prime Factors"
Sobras	Kazon- Pommar world	VOY	"Alliances"
Solais V	Place where Riva helped end a war	TNG	"Loud as a Whisper"; DS9 "The Adversary"
Solarion IV	Formerly a Federation colony	TNG	"Ensign Ro"
Solosos III	poisoned By Sisko; uninhabitable By Humans for 50 years	DS9	"For the Uniform"
Sothis III	Homeworld of the Satarran people	TNG	"The Chase"
Soukara	In Dominion controlled space	DS9	"Change of Heart"
Stakoron II	In the Gamma Quadrant, contains Mizainite ore	DS9	"The Nagus"
Straleb	Omega Sagitta system	TNG	"The Outrageous Okona"
Styris IV	Plagued by Anchilles Fever in 2364	TNG	"Code of Honor"
Surata IV	Riker was injured by a local plant	TNG	"Shades of Gray"
Suvin IV	Planet with famous ruins	TNG	"Rascals"
T' Lani III	Population was wiped out by a war	DS9	"Armageddon Game"
T' Lani Prime	Planet in the T'Lani system	DS9	"Armageddon Game"
Tagra IV	In the Argolis Cluster	TNG	"True Q"
Tagus III	Planet with many archeological sites	TNG	"Qpid"
Takar	Delta Quadrant. Second planet in system; Class M	VOY	"False Profits"
Talax	Home of the Talaxians	VOY	"Jetrel"
Talos IV	Home of the Talosians, one of the most powerful telepathic species	TOS	"The Cage"
Tantalus V	Federation penal colony	TOS	"Dagger of the Mind"
Tanuga IV	Dr. Apgar worked on the Krieger Wave converter here	TNG	"A Matter of Perspective"
Tarakis	Location of telepathic memorial	VOY	"Memorial"
Tarchannen III	Crewmembers from the USS Victory were infected by alien DNA here	TNG	"Identity Crisis"
Tarella	Home of the Tarellians, who were all but destroyed in a biological war	TNG	"Haven"
Taresia	Delta Quadrant. Third planet in system	VOY	"Favorite Son"
Tarod IX	Near the Romulan Neutral Zone	TNG	"The Neutral Zone"
Tarok	Class M moon in Kazon-Olga space	VOY	"Initiations"
Tarsas III	Starbase 74 orbits here	TNG	"11001001"
Tarsus IV	Site of the infamous massacre by Kodos the Executioner	TOS	"Conscience of the King"
Tartaras V	Vash decided to explore here	DS9	"Q-Less"
Tau Alpha C	The Travelers home world	TNG	"Where No One Has Gone Before"
Tau Ceti III	Planet where Picard met Captain Rixx in 2364	TNG	"Conspiracy"
Tau Ceti Prime	Site of tragic accident in 2358 that claimed the life of Admiral Janeway	VOY	"Coda"
Tau Cygna V	Federation colony was established here in violation of the Treaty of Armens	TNG	"The Ensigns of Command"
Taurus II	Planet where the shuttlecraft Galileo crashed	TOS	"The Galileo Seven"
Tavela Minor	Planet nurse Ogawa considered taking a holiday on	TNG	"Imaginary Friend"
Telfas prime	Location of a mining community	VOY	"Alliances"
Tellar	Homeworld of the Tellarite civilisation; within striking distance of Betazed	DS9	"In the Pale Moonlight"
Teluridian IV	Alpha Quadrant planet	VOY	"Ex Post Facto"
Terlina III	Planet where Noonien Soongs laboratory was situated	TNG	"Inheritance"
Terosa Prime	Planet	DS9	"Second Sight"
Tessen III	Federation planet threatened by an asteroid in 2368	TNG	"Cost of Living"
Tethys III	Planet with a Hydrogen-Helium composition and a frozen core	TNG	"Clues"
Thalos VII	Coca beans are aged for four hundred years here	TNG	"The Dauphin"
Thanatos VII	A plasma conduit was manufactured here for the Enterprise-D	TNG	"Phantasms"
Thasus	Planet where Charlie Evans grew up	TOS	"Charlie X"
Thelka IV	Picard discovered an excellent dessert here	TNG	"Lessons"
Theta Cygni XII	Planet struck by the Denevan Neural Parasites	TOS	"Operation : Annihilate!"
Theta VII	Planet that requested vaccines from the Enterprise-D	TOS	"Obsession"
Theta VIII	Final destination of the spacecraft Charybdis	TNG	"The Royale"
Tiburon	Zora carried out unethical experiments here	TOS	"The Savage Curtain"
Tilonus IV	Will Riker was brainwashed after being captured on an away mission here	TNG	"Frame of Mind"
Titan	Moon of Saturn	TNG	"The First Duty"
Titus IV	Miles O'Brien almost stepped on a Lycosa Tarantula here	TNG	"Realm of Fear"
T'lli Beta	Destination of the Enterprise-D when it encountered 2 dimensional creatures	TNG	"The Loss"
Tohvun III	Neutral planet on the Federation - Cardassian border	TNG	"Chain of Command, Part II"
Torad IV	Gamma Quadrant; a planet which has mysterious botanical specimens	DS9	"Body Parts"
Toranius Prime	Popular vacation planet from Turakus	VOY	"Memorial"
Torga IV	Gamma Quadrant; vast quantities of cormaline	DS9	"The Ship"
Torman V	Picard gained transport for Celtris III from this planet	TNG	"Chain of Command, Part I"
Torna IV	Planet	DS9	"The Sword of Kahless"
Torona IV	Home of the Jarada	TNG	"The Big Goodbye"
Torros III	Location of Jem' Hadar space docks; destroyed by Federation forces at start of war.	DS9	"Call to Arms"
Tracken II	In the Demilitarised Zone; Maquis colony	DS9	"For the Uniform"
Triacus	Gorgan killed a Federation science team on this planet	TOS	"And the Children Shall Lead"
Trill homeworld	Class M planet	DS9	"Equilibrium"
Triskelion	M-24 Alpha system	TOS	"The Gamesters..."
Troyius	Tellun system	TOS	"Elaan of Troyius"
Turkana IV	Tasha Yars birthplace; site of a failed Federation colony	TNG	"Legacy"
Ty' Gokor	Planetoid in asteroid field deep in Klingon space; new site of Klingon H Q	DS9	"Apocalypse Rising"
Tycho IV	Home of the vampire cloud creature	TOS	"Obsession"
Tyree	Planet on which Sisko found the Orb of the Emissary	DS9	"Image in the Sand"
Tyrellia	Federation planet with no atmosphere and no magnetic pole	TNG	"Starship Mine"
Tyrus VII A	Tyran system	TNG	"The Quality of Life"
Tzenketh	Homeworld of the Tzenkethi	DS9	"By Inferno's Light"
Ufandi III	The Duras sisters transferred illegal goods through here	TNG	"Firstborn"
Ultima Thule	Location of Dolamide purification plant	DS9	"Dramatis Personae"
Umoth VIII	In the Demilitarised Zone	DS9	"The Maquis, Part II"
Unefra III	Enabran Tain lived here during his retirement	DS9	"Improbable Cause"
Vacca VI	Cabral system	TNG	"Homeward"
Vadris III	Natives think they are the only intelligent life in the universe	DS9	"Q- Less"
Vagra II	Zed Lapis system. Tasha Yar was murdered on this planet.	TNG	"Skin of Evil"
Valo I	At least three moons	TNG	"Ensign Ro"
Valo II	Located in the Valo system, near the Cardassian border	TNG	"Ensign Ro"
Valo III	Located in the Valo system, near the Cardassian border	TNG	"Ensign Ro"
Valt Minor	Planet at war with Krios	TNG	"The Perfect Mate"
Vandor IV	Location of Doctor Manheims laboratory	TNG	"We'll Always Have Paris"
Vandros IV	Site of Iconian Gateway	DS9	"To the Death"
Vega Colony	Destination of the USS Enterprise when it received a distress call from the USS Columbia	TOS	"The Cage"/ "The Menagerie 1"
Velara III	In the Pleiades Cluster	TNG	"Home Soil"
Veloz Prime	In the Demilitarised Zone; Cardassian colony; attacked by Maquis with biogenic weapon	DS9	"For the Uniform"
Vendikar	Fought a five century long computer war with Endikar, in the same system	TOS	"A Taste of Armageddon"
Ventax II	Planet that entered into a bargain with the devil, Ardra	TNG	"Devil's Due"
Venus	Sol II	DS9	"Past Tense, Part I"
Veridian III	Destroyed by star collapse in alternate timeline	Star Trek : Generations
Veridian IV	Destroyed by star collapse in alternate timeline	Star Trek : Generations
Vilmor II	Clues to the ancient seeding of Humanoids was found here	TNG	"The Chase"
Volchok Prime	The Ferengi Hoex bought his rivals cargo port here	DS9	"The Nagus"
Volon II	In the Demilitarised Zone	DS9	"The Maquis, Part I"
Volon III	In the Demilitarised Zone	DS9	"The Maquis, Part II"
Vulcan	Home of the Vulcans, founding members of the Federation	TOS	"Amok Time"
Wrigley's Pleasure Planet	Planet where Enterprise crewmember Darnell met a beautiful woman	TOS	"Man Trap"
Xanthras III	Destination of the Enterprise-D in 2366	TNG	"Menage a Troi"
Xerxes VII	Legend says a mythical land called Neinman is found here	TNG	"When the Bough Breaks"
Yadalla Prime	Archeological site, possible target for Baran's mercenary team	TNG	"Gambit"
Yadera II	Gamma Quadrant home of Rurigan	DS9	"Shadowplay"
Yadera Prime	Conquered by the Dominion in 2340	DS9	"Shadowplay"
Zadar IV	Planet where Dr. Harry Bernard once lived	TNG	"When the Bough Breaks"
Zalkon	Homeworld of the Zalkonians	TNG	"Transfigurations"
Zayra IV	Where Miles O'Brien rerouted an emitter array	TNG	"Realm of Fear"
Zeon	Peaceful neighbors to the planet Ekos	TOS	"Patterns of Force"
Zeta Alpha II	USS Lalo departed here before being lost to the Borg	TNG	"The Best of Both Worlds"
Zetar	Home to the Zetareans, destroyed millennia ago	TOS	"The Lights of Zetar"
Zytchin III	Captain Picard once spent a four day vacation there which he claimed not to enjoy	TNG	"Captain's Holiday"