Class M

In the Federation standard system of planetary classification, a class M or Minshara class planet, moon, or planetoid was considered to be suitable for humanoid life. By the mid-24th century, thousands of class M planets had been charted by the Federation. These worlds were the first choice for colonization. Since the early 22nd century, Humanity (and later, the Federation) has been terraforming lifeless worlds such as Mars into class M worlds. Environmental conditions on Federation starships mimicked the class M environment. (; ; )
== History ==
During the mid-22nd century, Vulcan science used the term Minshara-class for such planets. Vulcans were not able to confirm if a planet was Minshara-class through orbital scans, instead sending down probes to collect the necessary . () In 2151, Starfleet officers were not familiar with the term and chose to adopt it. However, by 2154, Starfleet had adopted the term class M. A century later, that term was in general use in Starfleet, even though the term "Earth-type" was also occasionally used.
By the 23rd century, it was theorized that there was a mathematical probability of three million Earth-type planets in the Milky Way Galaxy alone. ()
A planet could fall within the range of the M-class classification. This range was from 1 to 4. The Koinonian homeworld was an example of an M-class type 4 planet. ()
The term was sometimes used to characterize an atmosphere rather than a planet. The standard environment aboard Federation starships was class M. ()
==Qualities==
*Size: Class M worlds were typically terrestrial planets or moons, although planetoids and even large asteroids could qualify if they were massive enough to retain an atmosphere. () The gravity on these worlds was generally Earth normal, but could be slightly less or slightly more. (; )
*Orbit: Class M worlds were rare in binary star systems. () These planets were typically located in the habitable zones of their systems (), though terrestrial rogue planets could quantify as class M when sufficient from their interiors was vented outward by geological activities. () At least one class M planet, Finibus III, orbited a black hole rather than a conventional star. ()
*Atmosphere: The atmosphere contained large percentages of nitrogen and oxygen, and smaller percentages of trace elements. Most planets had nucleogenic particles in the atmosphere; those without were incapable of producing rain. The atmosphere on these worlds was approximately Earth normal. (; ; ) Temperatures might potentially be hot, but there was an upper limit. ()
*Surface: The surface of these planets was usually abundant in water. Minshara-class planets were sometimes described as appearing and green from space, indicating water and plant life respectively, although this was not a universal quality. ()
*Interior: Beneath the surface, there were additional sources of water. These worlds were geologically active and rich in minerals. () The planetary core of these planets was nickel-iron. (; ) Some of them had a bemonite mantle. ()
*Life: These worlds had ecosystems and contained amino acids and protein readings. High percentages of both indicated healthy plant life. Many of these worlds supported carbon-based plant and animal life; any non-carbon-based would have to be non-indigenous. A smaller number of these worlds had proto-humanoid, humanoid, and Proto-Vulcan humanoid lifeforms. (; ; )
*Other: Class M worlds emitted electromagnetic radiation. ()
== List of class M worlds ==
=== Named ===
Image	Name 	Location 	Indigenous sentient species 	Notes 	Source
 	892-IV 	System 892 	892-IV natives 	Density, atmosphere, and proportion of land to water identical to those of Earth; diameter and layout of land masses somewhat different 	
 	Akaali homeworld 	78 light years from Earth, Alpha Quadrant 	Akaali 	 	
 	Alpha Carinae II 	Canopus, Beta Quadrant 	Alpha Carinae II natives 	 	
 	Alpha Onias III 	Alpha Onias system, Beta Quadrant 	 	 	
 	Alshain IV 	 	Alshain 	 	
 	Altamid 	Altamid system, Necro Cloud 	 	 	
 	Angel I 	Near the Romulan Neutral Zone 	Angel I natives 	 	
 	Ankari homeworld 	Delta Quadrant 	Ankari 	 	
 	Archer IV 	61 Ursae Majoris 	None 	 	
 	Argeth 	 	 	 	
 	Arret 	Alpha Quadrant 	Arretan 	Atmosphere destroyed 500,000 years ago during a civil war 	
 	 	Briar Patch, Sector 441, Alpha Quadrant 	 	Metaphasic radiation from the rings grants those on the surface immortality 	
 	Barradas III 	Barradas system, Sector 2158, Beta Quadrant 	 	 	
 	Berengaria VII 	Berengarius system, Alpha Quadrant 	None 	 	;
 	Boraal II 	 	Boraalans 	Biosphere destroyed by an atmospheric dissipation in 2370 	
 	Boreth 	Beta Quadrant 	 	 	;
 	Bringloid V 	Bringloid system, Ficus sector 	 	Devastated by solar flares in 2365, habitability uncertain 	
 	Cajitar IV 	Cajitar system 	 	 	
 	Ceti Alpha V 	Ceti Alpha star system, Sector 25712, Alpha Quadrant 	 	"Barely" class M to begin with; further devastated by an orbital shift after the explosion of Ceti Alpha VI in late-2267 or early-2268 	; ;
 	Coppelius 	Ghulion system, Vayt sector 	 	 	
 	Dannus V 	Near the Gamma Quadrant, in the galactic rim 	 	 	
 	Dansk 	 	 	 	
 	Delphi Ardu IV 	Delphi Ardu system 	 	No indigenous life forms as of 2364 	
 	Delta Theta III 	 	Delta Theta III aborigines 	 	
 	 	40 Eridani A, Vulcan system, Sector 001, Alpha Quadrant 	 	 	
 	Dozaria 	Dozaria system 	 	"Barely" class M 	
 	Draygo IV 	Cardassian sector 	 	 	
 	Draylon II 	Bajoran sector, Alpha Quadrant 	 	 	
 	Earth 	Sol system, Sector 001, Alpha Quadrant 	Humans, Neanderthals, Voth, and Humpback whales	 	, et al
 	Finibus III 	Finibus system 	 	Orbits a black hole. 	
 	 	Omarion Nebula, Gamma Quadrant 	 	A rogue planet; devastated by orbital bombardment during the Battle of the Omarion Nebula in 2371 	
 	Gamma Hromi II 	Gamma Hromi, Hromi Cluster, Beta Quadrant 	 	 	
 	Gamma Hydra IV 	Gamma Hydra, Gamma Hydra sector, Beta Quadrant 	 	 	
 	Geryon 	Orbiting Theta Helios 	 	Described as a "desert moon". 	
 	Halem'no 	 	Halem'nites 	Much of the planet's biosphere had been consumed by dust storms by 3191, with only a Denobulan weather modification tower providing irrigation to a small region.	
 	Hanon IV 	Hanon system, Delta Quadrant 	Hanonians 	 	
 	Haven 	Beta Cassius 	Haven natives 	 	
 	Hemikek IV 	Hemikek system, Delta Quadrant 	 	 	
 	Hetemit IX 	 	 	 	
 	Hunhau 	Inside Emerald Chain space as of 3189 	 	 	
 	Keto-Enol 	 	 	 	
 	Kiley 279 	Kiley system 	Kiley 	 	
 	Koinonian homeworld	 	Non-corporeal s and the extinct corporeal 	Barren, though still class M (type 4), following the Koinonian Wars 	
 	Kolarus III 	Kolarin system, near the Romulan Neutral Zone 	Kolarans 	 	
 	Krulmuth-B 	 	 	 	
 	 	Kwejian system 	Kwejian 	Destroyed by the Dark Matter Anomaly in 3190 	
 	Kylata II 	Gamma Quadrant 	 	 	
 	Lactra VII 	Alpha Quadrant 	Lactrans 	 	
 	Lambda Paz 	Orbiting Pentarus III, Pentarus system 	 	"Barely" class M as of 2367 	
 	Lapeeria 	Laap system 	Lapeerians 	 	
 	Locarno 	Detrion system, Alpha Quadrant 	 	Created by the detonation of a Genesis Device in 2381 	
 	Lyrek 	Vileen system, Beta Quadrant 	 	 	
 	M-113 	 	M-113 creatures 	 	
 	Makull's homeworld 	Orbiting a red dwarf, Delta Quadrant 	Makull's species 	 	
 	 	Ficus sector 	 	 	
 	 	Minos Korva system, Sector 21527, Alpha Quadrant 	 	 	
 	 	FGC-347601 system, Alpha Quadrant 	Miri natives 	An exact physical duplicate of Earth with a divergent history 	
 	Murder Planet 	Hirogen star system, Delta Quadrant 	Cilium-like vegetation (superorganism) 	 	
 	Neural 	 	Neural natives 	 	
 	Nibiru 	 	Nibirans 	Flora is red instead of the typical green 	
 	Noble Isle 	Romulan Neutral Zone, Beta Quadrant 	 	Possessed a turbulent atmosphere prone to ion storms, accessible only via space elevator 	
 	 	Ocampa system, Delta Quadrant 	Ocampans 	Though still habitable as of 2371, an artificial disaster millennia ago left it incapable of producing rain 	
 	Omicron Theta 	Omicron Theta star system 	 	Stripped of life by the Crystalline Entity in 2338, though still class M as late as 2364 	
 	Orellius 	Orellius system, Alpha Quadrant 	 	 	
 	Organia 	Alpha Quadrant 	Organians 	 	
 	Orias III 	Orias system, Alpha Quadrant 	 	 	
 	Otrin's homeworld 	Grid 310, Delta Quadrant 	Otrin's species 	Recovering from nuclear winter as of 2378 	
 	Parnassus Beta 	Parnassus system 	 	 	
 	Paxan homeworld 	Orbiting a T-Tauri type star in the Ngame Nebula 	 	A protoplanet; terraformed by the Paxans prior to 2367 	
 	Pentarus II 	Pentarus system 	 	 	
 	Pentarus V 	Pentarus system 	 	 	
 	Persephone III 	Persephone system, Alpha Quadrant 	Deleb 	 	
 	Planet 0042692 	 	"Enderprizians" 	 	
 	Planet Hell 	Delta Quadrant 	 	Atmosphere saturated with trigemic vapors and EM disturbances 	
 	Pollux IV 	Beta Geminorum system, Alpha Quadrant 	Greek gods 	 	
 	"Q's planet" 	 	 	Possibly an illusory world created by Q 	
 	Qo'noS 	Qo'noS system, Sector 70, Block 27, Beta Quadrant 	Klingons 	 	, , et al
 	Quarra 	Delta Quadrant 	 	 	
 	Rakhar 	Rakhari sector, Gamma Quadrant 	Rakhari 	 	
 	Rakosa V 	Delta Quadrant 	Rakosans 	 	
 	Rigel VII 	Rigel system, Alpha Quadrant 	Kalar 	 	,
 	Ruah IV 	 	None 	 	
 	Rubicun III 	Rubicun star system, inside a star cluster 	Edo 	 	
 	Sarpeidon 	Alpha Quadrant 	Sarpeidon natives 	Destroyed when its sun went supernova in 2269 	
 	Sigma Draconis III 	Sigma Draconis star system, Alpha Quadrant 	Sigma Draconis III natives 	 	
 	Sigma Draconis IV 	Sigma Draconis star system, Alpha Quadrant 	Sigma Draconis IV natives 	 	
 	Sigma Draconis VI 	Sigma Draconis star system, Alpha Quadrant 	Sigma Draconis VI natives 	 	
 	Talos IV 	Talos system, Talos star group, Alpha Quadrant 	Talosians 	 	;
 	Takarian homeworld 	Delta Quadrant 	Takarians 	 	
 	Tamaal 	A binary star system near or inside Enolian space as of 2152 	 	 	
 	Tarakis 	Delta Quadrant 	 	 	
 	Tarella 	 	Tarellians 	Ravaged by the Tarellian Civil War, habitability uncertain 	
 	Tarok 	Orbiting a gas giant planet in the Delta Quadrant 	 	 	
 	Tarquin's planet 	Delphic Expanse 	 	 	
 	Taurus II 	Murasaki 312, three light days away from Makus III 	Taurus II anthropoids 	 	
 	Terra 10 	Cepheus, near Arachna 	 	Subject to natural spiroid epsilon waves 	
 	Terra Nova 	Less than 20 light years from Sol 	 	 	
 	Terralysium 	51,000 light years from Sol, Beta Quadrant 	 	 	
 	Trialas IV 	Trialas system, near the Borderland 	 	 	
 	 	Alpha Quadrant 	Trills and symbionts 	 	;
 	Vacca VI 	Vaccan system, Cabral sector 	 	New homeworld for the Boraalans as of 2370 	
 	Valakis 	Alpha Quadrant 	Valakians and Menk 	 	
 	Valo I 	Valo system, on the outskirts of Cardassian space, Alpha Quadrant	 	 	
 	Valo II 	Valo system, on the outskirts of Cardassian space, Alpha Quadrant	 	 	
 	Valo III 	Valo system, on the outskirts of Cardassian space, Alpha Quadrant	 	 	
 	Veridian III 	Veridian system, Beta Quadrant 	None 	 	
 	Veridian IV 	Veridian system, Beta Quadrant 	Veridian IV natives 	 	
 	 	40 Eridani A, Vulcan system, Sector 001, Alpha Quadrant 	Vulcans 	Renamed Ni'Var as of 3189. 	, et al
 	 	40 Eridani A, Vulcan system, Sector 001, Alpha Quadrant 	Vulcans 	Consumed by an artificial black hole in an alternate 2258 	
 	Xahea 	Grid 07, Quad 09, block 3, sector 1 	Xaheans 	 	;
 	 	 	Xantoras 	 	
=== Unnamed ===
Image	Name 	Location 	Indigenous sentient species	Notes 	Source
 	Unnamed asteroid in the Badlands 	Badlands, Alpha Quadrant 	 	 	
 	Unnamed dark matter nebula planet 	Inside a dark matter nebula, located in or near Cardassian space 	 	 	
 	Unnamed breeding planet 	 	 	Used by the Gorn as a breeding planet as of 2259 	
 	Unnamed Hur'q Central Museum planet 	Gamma Quadrant 	 	 	
 	Unnamed moon of Mab-Bu VI 	Orbiting Mab-Bu VI, Alpha Quadrant 	 	Constantly swept by ionic cyclones and electromagnetic storms 	
 	Moon near Allos' homeworld 	Same star system as Allos' homeworld, orbiting an inward planet, Delta Quadrant 	 	Atmosphere extended up more than eleven thousand kilometers from the surface 	
 	Unnamed planet used by the Maquis 	 	 	 	
 	Unnamed planet in the Delta Quadrant 	Delta Quadrant 	 	 	
 	Unnamed planet in the Delta Quadrant 	Delta Quadrant 	 	 	
 	Unnamed planet under Organian observation 	 	 	Home to a silicon-based virus, possibly not native to the planet 	
 	Unnamed sixth planet of System J-25 	System J-25 	 	 	
 	Unnamed planet inhabited by rock beasts 	A binary star system 	None 	 	
 	Unnamed planet annexed by the Romulan Star Empire 	 	 	 	
 	Unnamed planet in the Strnad solar system 	Strnad solar system, inside a stellar cluster 	 	 	
 	Unnamed planet surveyed by the in 2376 	Delta Quadrant 	 	 	
 	Unnamed "Federation colony" planet 	Delta Quadrant 	 	 	
 	Unnamed planet, a potential new homeworld for Otrin's species	132 light years from Otrin's homeworld, Delta Quadrant 	 	 	
 	Unnamed planet, a potential new homeworld for the Talaxians 	Delta Quadrant 	 	 	
 	Unnamed planet, a potential new homeworld for the Vaadwaur 	Orbiting a G-type star in the Delta Quadrant 	 	 	
 	Unnamed planetoid where the crashed in 2375 	Delta Quadrant 	 	Has a bemonite mantle 	
 	Unnamed Vidiian planetoid 	Delta Quadrant 	 	A rogue planetoid; subterranean caves were class M 	
 	Multiple unnamed Terikof belt planetoids 	Terikof belt, Badlands, Alpha Quadrant 	 	 	
 	Moon located in B'omar space; crash site of the 	Orbiting the fifth planet in a yellow dwarf system, B'omar space, Delta Quadrant	 	 	
 	Unnamed planet, crash site of a Terellian cargo freighter 	 	 	Influenced by violent plasma storms 	
 	Multiple asteroids in an unnamed planet's ring system 	Inside the ring system of a class D planet in the Delta Quadrant 	 	Class M environment likely transplanted from the Vhnori homeworld via subspace vacuoles	
 	Multiple planets in the Mar Oscura Nebula 	Mar Oscura Nebula 	 	 	
 	Four planets in the Federation-Cardassian border area 	 	 	 	
== Appendices ==
=== Background information ===
* The term "class M" was first used in to describe the planet Talos IV. The variant "M class" was also often used. The term has become Star Trek shorthand for Earth-like, and due to obvious production practicalities, this environment is the "default" for planetary surface scenes. It should be noted, however, that not all "Earth-like" planets are necessarily class M: class L worlds such as Kelis' homeworld () and even the occasional class D (such as the one seen in ) can support life as well.
* The Vulcan term "Minshara-class" (first used in ) was used in Enterprise to denote planets that in other series would have been called class M by the writers, the implied consequence being that the two terms meant the same, and possibly even that M stood for Minshara. This assumption is supported by the reference book Star Trek: Star Charts. From an in-universe standpoint, the term M-class was first seen chronologically in a text within the Handbook of Exobiology in , the same episode that introduced Minshara-class. However, this mention was barely legible on-screen and may have been included by an art department not yet aware of the intention to use "Minshara class". The first spoken use of the word was in , in which Archer used it to describe Archer IV, a planet implied (but not explicitly confirmed) to be Minshara class in . The term continued to be used several more times in the final season, while "Minshara-class" made no more appearances. The last use of "Minshara class" was in season three's , where it was still used in 2156 in an alternate timeline. The term also appeared on Enterprises computer displays, indicating that Starfleet adapted it eventually. According to the novella The Tears of Eridanus, Minshara is one of many names for the planet Vulcan.
* In , Spock called planet Arret class M despite the atmosphere having been ripped away, suggesting that the class M designation goes beyond being able to support life. Alternately, he could have been saying that the planet, prior to losing its atmosphere, would have been categorized as class M.
* Ceti Alpha V was described as "barely Minshara class" in , but also as no more inhospitable and savage than the site of Australia's Botany Bay colony before colonization in , suggesting that even on a class M planet like Earth, there might be locations that stretch the definition. Alternatively, the planet might have become more hospitable in the century between the two episodes.
* According to Star Trek: Star Charts, class M planets have ages that range from 3 billion to 10 billion years and a diameter between 10,000 and 15,000 kilometers. They are located within the ecosphere of a star system.
==== List of Planets and Moons ====
Class M planets from the and StarTrek.com.
Image	Name 	Location 	Indigenous sentient species	Notes 	Source
 	1865-Alpha 	Delta Quadrant 	 	 	
 	Ajilon Prime 	Ajilon system, Beta Quadrant 	 	 	
 	Alastria 	Alastria system, Delta Quadrant 	 	 	
 	Alfa 177 	Alpha Quadrant 	 	 	
 	Amerind 	 	 	 	StarTrek.com
 	Amleth Prime 	Amleth system, Alpha Quadrant 	 	 	StarTrek.com
 	Andoria 	Andorian system, Alpha Quadrant 	Andorians, Aenars 	 	
 	Angosia III 	 	Angosians 	 	
 	Antede III 	 	Antedians 	 	
 	Ardana 	Ardana system, Beta Quadrant 	Ardanans 	 	
 	Argelius II 	Argelius system, Beta Quadrant 	Argelians 	 	StarTrek.com
 	Athos IV 	Demilitarized Zone, Badlands, Alpha Quadrant 	 	 	
 	Atlec 	Omega Sagitta system, Alpha Quadrant 	Atlec inhabitants 	 	
 	Atrea IV 	 	Atreans 	 	
 	Avery III 	Avery system, Delta Quadrant 	 	 	
 	Azati Prime 	Azati Prime system, Delphic Expanse, Alpha Quadrant 	 	 	StarTrek.com
 	 	Briar Patch, Sector 441, Alpha Quadrant 	 	Metaphasic radiation from the rings grants those on the surface immortality	
 	Bajor 	Bajoran system, Bajor sector, Alpha Quadrant 	Bajorans 	 	
 	Barkon IV 	 	Barkonians 	 	
 	Beta III 	C-111 system 	s 	 	
 	Beta XII-A 	In orbit of Beta Leonis Minoris, Alpha Quadrant 	 	 	
 	Beta Agni II 	Beta Agni system 	 	 	
 	Betazed 	Beta Zeta system, Alpha Quadrant 	Betazoids 	 	
 	Bilana III 	 	 	 	
 	Bopak III 	Bopak system, Gamma Quadrant 	 	 	
 	Brekka 	Delos system 	Brekkians 	 	StarTrek.com
 	Brunali homeworld 	Delta Quadrant 	Brunali 	 	
 	Camor V 	Camor system 	Camorites 	 	
 	Capella IV 	In orbit of Capella, Alpha Quadrant 	Capellans 	 	
 	Canopus III 	In orbit of Canopus, Beta Quadrant 	 	 	StarTrek.com
 	Cardassia IV 	Cardassian system, Alpha Quadrant 	 	 	StarTrek.com
 	Celtris III 	Alpha Quadrant 	 	 	
 	Cheron 	 	Cheron natives (extinct) 	 	
 	Dakala 	Interstellar space 	Wraiths 	Rogue planet 	
 	Daran V 	Alpha Quadrant 	Daran V natives 	 	StarTrek.com
 	Delta Vega 	Near the galactic barrier, Delta Vega sector, Alpha Quadrant 	None 	Slightly smaller than Earth; 	
 	Deneb IV 	Deneb system, Alpha Quadrant 	Bandi 	 	
 	Deneva 	Deneva system, Alpha Quadrant 	 	 	StarTrek.com
 	Denobula 	Denobula Triaxa system, Beta Quadrant 	Denobulans 	 	StarTrek.com
 	Dessica II 	Dessica system, Beta Quadrant 	 	 	StarTrek.com
 	Devidia II 	Devidia system, Marrab sector 	Devidians 	 	
 	Dorvan V 	Dorvan sector, Alpha Quadrant 	 	 	
 	Drayan II 	Delta Quadrant 	Drayans 	 	
 	Dreon VII 	Dreon system, Alpha Quadrant 	 	 	StarTrek.com
 	Ekos 	 	Ekosians 	 	
 	El-Adrel IV 	El-Adrel system 	 	 	StarTrek.com
 	Elaysian homeworld 	 	Elaysians 	 	StarTrek.com
 	Eminiar VII 	Eminiar system, NGC 321, Alpha Quadrant 	Eminians 	 	
 	Enara Prime 	Delta Quadrant 	Enarans 	 	StarTrek.com
 	Epsilon Hydra VII 	 	 	 	StarTrek.com
 	Ferenginar 	Ferenginar system, Alpha Quadrant 	Ferengi 	 	
 	Forlat III 	 	 	 	
 	Gaia 	Gamma Quadrant 	 	 	
 	Galen IV 	Alpha Quadrant 	 	 	
 	Gamelan V 	Gamelan system 	Gamelan V natives 	 	
 	Gamma Trianguli VI 	Gamma Trianguli system, Gamma Trianguli sector 	Vaalians 	 	
 	Gault 	 	 	 	StarTrek.com
 	Gemulon V 	 	 	 	StarTrek.com
 	Genesis Planet 	Genesis sector, Mutara sector 	 	Destroyed 	
 	 	Alpha Quadrant 	Gideon 	 	
 	Golana 	Alpha Quadrant 	Golanans (extinct) 	 	
 	Gosis' species homeworld 	 	Gosis' species 	 	
 	Hakton VII 	Alpha Quadrant 	 	 	StarTrek.com
 	Hansen's Planet 	 	Hansen's Planet anthropoids	 	
 	Hekaras II 	Hekaras sector 	Hekarans 	 	
 	Hur'q planet 	Gamma Quadrant 	 	 	
 	Itamish III 	 	 	 	StarTrek.com
 	Jeraddo 	In orbit of Bajor, Bajoran system, Bajoran sector, Alpha Quadrant	 	 	
 	Kaelon II 	 	Kaelon 	 	
 	Kataan 	Kataan star system, Silarian sector 	Kataan natives 	Destroyed by solar radiation 	
 	Kavaria 	Alpha Quadrant 	 	 	StarTrek.com
 	Kesprytt III 	 	Kesprytt 	 	
 	Khefka IV 	 	 	 	StarTrek.com
 	Khitomer 	Khitomer system, Beta Quadrant 	 	 	
 	Kohl settlement 	Delta Quadrant 	 	 	StarTrek.com
 	Krios Prime 	Kriosian system, Beta Quadrant 	Kriosian 	 	
 	L-S VI 	Gamma Quadrant 	 	 	StarTrek.com
 	Ledonia III 	 	 	 	StarTrek.com
 	Ledos 	Delta Quadrant 	Ledosians and Ventu 	 	
 	Ligon II 	 	Ligonians 	 	
 	Ligobis X 	 	 	 	StarTrek.com
 	Loresworld 	 	 	 	StarTrek.com
 	Malcor III 	 	Malcorians 	 	
 	Maranga IV 	 	 	 	
 	Marva IV 	Demilitarized Zone, Alpha Quadrant 	 	 	
 	Melona IV 	 	 	 	Destroyed by Crystalline Entity;
 	Merak II 	Merak system, Alpha Quadrant 	 	 	StarTrek.com
 	Meridian 	Trialus system, Gamma Quadrant 	Meridian inhabitants 	 	
 	Mintaka III 	In orbit of Mintaka 	Mintakans 	 	
 	Mordan IV 	 	Mordanites 	 	
 	Nervala IV 	 	 	 	
 	New Vulcan 	 	 	 	
 	Nezu colony planet 	Delta Quadrant 	 	 	
 	Nimbus III 	Neutral Zone 	 	 	
 	Nyria III 	Nyrian system 	 	 	
 	Omega IV 	 	Omega IV natives 	 	
 	Omicron Ceti III 	In orbit of Omicron Ceti 	 	 	
 	Paraagan II 	 	 	Destroyed by a tetrazine explosion 	
 	Peliar Zel II 	Peliar system, Alpha Quadrant 	Pelians 	 	
 	Penthara IV 	 	 	 	
 	Planet X 	 	 	Fictional planet from The Adventures of Captain Proton 	
 	Platonius 	Alpha Quadrant 	Platonians 	 	
 	Qu'Vat 	Beta Quadrant 	 	 	
 	Qualor II 	Sector 213, Beta Quadrant 	 	 	
 	Rana IV 	Delta Rana star system 	 	Destroyed by the Husnock 	
 	Rekag-Seronia 	 	 	 	
 	Relva VII 	 	 	 	StarTrek.com
 	Rigel IV 	Rigel system, Alpha Quadrant 	Rigel IV natives 	 	StarTrek.com
 	Rigel XII 	Rigel system, Alpha Quadrant 	 	 	
 	Rinax 	In orbit of Talax, Talaxian system, Delta Quadrant 	 	 	
 	Risa 	In orbit of Epsilon Ceti B, Alpha Quadrant 	Risians 	 	
 	Ronara Prime 	Demilitarized Zone, Alpha Quadrant 	 	 	
 	Rutia IV 	 	Rutians 	 	
 	Scalos 	Alpha Quadrant 	Scalosians (extinct) 	 	
 	Secarus IV 	Secarus system 	 	 	
 	Sigma Iotia II 	Sigma Iotia system, Beta Quadrant 	Iotians 	 	
 	Sikaris 	Delta Quadrant 	Sikarians 	 	
 	Sky Spirits' homeworld 	Delta Quadrant 	Sky Spirits 	 	StarTrek.com
 	Solais V 	Solais system 	Solari 	 	
 	Solosos III 	Demilitarized Zone, Alpha Quadrant 	 	 	
 	Surata IV 	 	 	 	
 	Symbiogenetic alien orchid homeworld	Delta Quadrant 	 	 	StarTrek.com
 	Tagra IV 	Tagra system, Argolis Cluster, Alpha Quadrant 	Tagrans 	 	StarTrek.com
 	Talax 	Talaxian system, Delta Quadrant 	Talaxians 	 	
 	Tanuga IV 	 	Tanugans 	 	
 	Tarchannen III 	Tarchannen system 	 	 	
 	Taresia 	Taresian system, Delta Quadrant 	Taresians 	 	
 	Teplan homeworld 	Teplan system, Gamma Quadrant 	Teplans 	 	StarTrek.com
 	Terlina III 	Terlina system 	 	 	StarTrek.com
 	Tilonus IV 	 	Tilonians 	 	
 	Torga IV 	Gamma Quadrant 	 	 	
 	Torman V 	Alpha Quadrant 	 	 	
 	Torna IV 	 	 	 	
 	Triacus 	 	Triacus marauders 	 	
 	 	Muratas Star Cluster, Delphic Expanse 	Triannons 	 	
 	Turkana IV 	Turkana system, Beta Quadrant 	 	 	
 	Tycho IV 	Tycho system 	 	 	StarTrek.com
 	 	 	 	 	
 	Umoth VIII 	Alpha Quadrant 	 	 	StarTrek.com
 	Vagra II 	Zed Lapis sector 	Vagrans 	 	StarTrek.com
 	Ventax II 	 	Ventaxians 	 	
 	Verdanis 	 	 	New home for Terra 10 colonists 	StarTrek.com
 	Volan II 	In orbit of Volan, Alpha Quadrant 	 	 	StarTrek.com
 	Volan III 	In orbit of Volan, Alpha Quadrant 	 	 	StarTrek.com
 	Vori homeworld 	Delta Quadrant 	Vori 	 	
 	Xindi-Arboreal colony 	Delphic Expanse 	 	 	
 	 	 	Zeons 	 	
 	Unnamed planet 	Mericor system 	 	 	StarTrek.com
 	Unnamed moon 	Badlands, Alpha Quadrant 	 	 	StarTrek.com
 	Unnamed planet 	Delta Quadrant 	 	 	StarTrek.com
=== Apocrypha ===
The Strangers from the Sky indicates that the term "class M" was used by Humans prior to First Contact with Vulcans, or indeed before Humanity reached any extra-solar planets.
=== See also ===
*Earth normal
=== External link ===
*
bg:Клас M
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fr:Planète de classe M
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M
Category:Celestial objects
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