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Eta Cassiopeia (sometimes also referred to as Eta Cassiopeiae or Achird) is a binary star system located around 20 light-years from the Sol system. It was orbited by at least three planets, one of which became a Human colony in the late 21st century.

In 2087, the Terra Nova colony was established on the third planet of the system by Humans, in an attempt to prove that Humans could actually establish a colony in deep space. In 2178, the system became a member of the United Federation of Planets. (ENT episode: "Terra Nova" and ST reference: Star Charts)

During 2277, in the mirror universe, Grand Admiral Matthew Decker assembled a task force in this system in the hopes of ambushing the ISS Enterprise and killing Admiral Spock. However, mutinies aboard the starships loyal to Decker meant that Spock was able to seize control of the fleet and declare himself the Grand Admiral of the Imperial Starfleet in Decker's place. (TOS - Glass Empires novel: The Sorrows of Empire)

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Template:Cassiopeia constellation

Alpha and Beta Quadrant stars and star systems (E)
EbionEbor TorEclosionatu's DepthsEdaraEdelaEderlyn's EndEdjaraEdmoraEdoraEdrinEdrisEdvaranEgara 172EisenhowerEivoxEizebEkinusEkkoranEl AdrelElaminElamraElbaEldaraElectriElexElgardElkauronEllionEllison's StarElnonElohimElonaElsk'vethElthanElvadaElvenElvrosElysia IncendaeElzanElzbarElzibarEmbenEmilaEminiarEmkaidEmmeline's GateEmranaEm'varaEmvatraEndicorEndless MawEndraEnkothEnochEnoriEnraEnteraEntrunarEofaranEojurEphrataEpsilon 119Epsilon Anubis (Epsilon Anubis AEpsilon Anubis B) • Epsilon BallaraEpsilon BetaEpsilon CetiEpsilon DeltaEpsilon FornacisEpsilon IonisEpsilon KitajEpsilon LyraEpsilon MinoraEpsilon MirandaEpsilon SierraEpsilon SoronaEpsilon TauriEpsilon ThetaEpsilon Ursae MajorisEpsionEquessEramorErcolaErdorErebErela DaraanEremarErgolErivekErkiaEr'vadiErvikEsablEscorEsindaEskiisEssaiEss'varaEstasiEstoEstradaEstronEstrona DaraanEta SeratornEta TauriEta TrianguliEth'bernekEth'dajaEth'feraEth'kabaEth'kinaEth'molaEth'silvaEth'teoEth'varaEtlaEvadexEvaraEvekExcalbiaExona DaraanExorEye of GabrielEye of HeliaEzani Alpha and Beta Quadrant icon image.
Alpha Quadrant stars and systems (E) EdasichEl NathElasi PrimeEltaninEnnarEnteliorEpsilon AurigaeEpsilon BoötisEpsilon CygniEpsilon DraconisEpsilon OphiuchiEpsilon SerpentisEta CassiopeiaeEta Coronae BorealisEta DraconisEta LyraeEta OphiuchiEta SerpentisEta Ursae MajorisExoEye of Ket-Cheleb Alpha Quadrant icon image.
Beta Quadrant stars and systems (E) EdenEdinovEisnEjul ThelniEpsilonEpsilon CanarisEpsilon Canis MajorisEdrenEpsilon CarinaeEpsilon CorviEpsilon EridaniEpsilon GeminorumEpsilon GruisEpsilon HydraeEpsilon Indi (Andoria) • Epsilon LibraeEpsilon MonocerotisEpsilon OrionisEpsilon PavonisEpsilon PhoenicisEpsilon ScorpiiEpsilon VirginisEta AntliaeEta Canaris / Eta Canis MajorisEta CorviEta CrucisEta EridaniEta HorologiiEta IndiEta LupiEta ScorpiiEta VirginisEye of Grun Beta Quadrant icon image.
Alpha and Beta Quadrant stars and star systems (A)
AaladAarakAarraAbakirAbalmaAbassaAbdadiAbelAberrizAbessiaAboiraAbraxasAbrenaAbroraAbroxAb'vekAbyss AlphaAccellusAchillonAcibenAdigeonAdonoloAdraAd'rethAdrian's BaneAd'vethAecupusAeonAerieAerimeaAesaAesirAesuriAetisanAexixAfebraAfervaAflorAfritalisAgbarAgiirratAgricoAhadiAhzdarAia'vadiAiligAinAinaroAindiaAin'TokAirolaAitiAjoraAkemoraAkersAkirenAlabasterAlactiAladfarAladsoAlakAlamedusAlannahAlarisAlastorAlatumAlcyoneAlderamAlderaminAldhanAlelaAlephAleraAlexisianAleydaAlfas DucatAlfin-BernardAlfirkAlforAlfrAlgeridaAlgeronAlilaAliothAlkaluropsAlkukAllendonAlmedoAlmeisanAlmekanAlnathAlnitakAlonsoAlorinaAlpha AldissAlpha ArietisAlpha AtaruAlpha BaratisAlpha CorandaAlpha DarwinAlpha DemetriusAlpha EmoriAlpha Epsilon TauriAlpha EquuleiAlpha FeronisAlpha HeliosAlpha HonorusAlpha HydrosAlpha ImvoriAlpha Is'tekAlpha KirikiAlpha KratoniiAlpha LeporisAlpha Min'rothAlpha MaluriaAlpha Marak 272Alpha NarniaAlpha NemvadiAlpha NexusAlpha NimorraAlpha OmicronAlpha OrionisAlpha OrtelinaAlpha ParnaculonAlpha PerseiAlpha QuarramAlpha SarpeidonAlpha ShiroAlpha SigmaAlpha TauAlpha Tel'rethAlpha TenoriAlpha ThetaAlpha TrimoraAlpha VarangisAlpha VegetisAlpha VergorisAlpha XaridianAlphaxAlsafiAltamidAltaneaAltanis IdrilonAltarAlthosAltorAludraAlulaAlvaradiAlvarkaAlyaAlycenAma DaraanAmalAmanaAmborisAmbrose's StarAmebisAmeldaAmi BeraAmmdonAmonAmpokAmpolisAmstarAmvadaAn DaraanAnaxaAnaxarAndraAndrade AbyssAndreaAndrekAndrocusAneldaAneziraAnkaaAnkiAngosiaAnnobonAnrakAnretaAntasAntedeAntiacusAntideAntigoneAntiliosAntipathyAntonehkAntos VeriaAntrosAnzibarAparchaAphir'kethApniraApriliaApyraAquila ScorpiAr DaraanArachnaeAradaArakAralanAraliAraraArb'saArbutusArcadiaArcan-BetaArcanis MajorisArchernarArchibaldArdajiArdanArdanaAretianArgentomeaArgezArgonaArhenniusAriaAriaxAriannaAridanesAridiaArkabArkenArktoArloffArmusArnabArnebArnebiusArnosAroriArovenArrakisArtaleirhArtemisArvadaAsaraAsearaAsellusAshgraveAshiraAsiti AlphaAsiti BetaAskalifex's SorrowAskalonAsmidiskeAsnethAsta DaraanAstamanteAstareaAsteropeAstra BelAstra BoraAstra EndaAstra FaraAstra ImraAstra InaAstra JelraAstra JoraAstra KaldaAstra KolAstra LeraAstra MelvaAstra MentaAstra NorAstra PevraAstra RendraAstra VeldraAstra VinAstra YaraAstra YeraAstridaAtabisAtaliaAtalisAtana DaraanAtarviAtlasAtriaAtriusAtropiraAtryn'aucdetAugustus GammaAumoide PoreAuvaAveryAvanAvekAv'telAX AraeAxelotAxtoxAyelaAyin AlephAylus AlphaAylus BetaAytaAyvrenAzati PrimeAzedisAzentraAzinda the galaxy's Alpha and Beta Quadrant icon image.
Alpha Quadrant stars and systems (A) AaamazzaraAbilakk AlphaAbilakk BetaAchirdActriumAdhilAdia AlphaAdia BetaAegis AquilaAjirAl NathAlam'ak system (Alam'ak) • AlbireoAlcorAldhibainAlferaz (Alferaz AAlferaz B) • AlgolAlkaidAlmachAlmathaAlpha Andromedae (Alpha Andromedae AAlpha Andromedae B) • Alpha AquariiAlpha AquilaeAlpha AurigaeAlpha BoötisAlpha Canum VenaticorumAlpha CamusAlpha Coronae BorealisAlpha CygniAlpha MajorisAlpha OphiuchiAlpha ProximaAlpha TrianguliAlpha Ursae MajorisAlpha ZariaAlpha-1 AndromedaeAlpha-2 AndromedaeAlpheccaAlpheratzAltairAmlethAnchaAndromedaAnkaroAnticaAntosAnzat AlphaAnzat BetaAokiiAquilaArawathArbazanArchariaArcturusArduriaArgayaArgusArtelineAscellaAtairAtikAureliaAvenal the galaxy's Alpha Quadrant icon image.
Beta Quadrant stars and systems (A) AcamarAchernarAcruxAcubensAdaraAdelphousAdhaferaAdharaAelasAgenaAgornuAgurthaAjilonAkaaliAl NairAlchibahAldebaranAlgorabAlhenaAlkesAlnilamAlpha-2 CentauriAlpha CancriAlpha Canis MinorisAlpha Canis Majoris (Alpha Canis Majoris AAlpha Canis Majoris B) • Alpha CarinaeAlpha Centauri (Alpha Centauri AAlpha Centauri BAlpha Centauri C) • Alpha ChamaeleonisAlpha CirciniAlpha Comae BerenicesAlpha CorviAlpha CrucisAlpha CygniAlpha EridaniAlpha GeminorumAlpha GruisAlpha HydriAlpha LeonisAlpha MensaAlpha MonocerotisAlpha OniasAlpha PictorisAlpha PrimeAlpha ScorpiiAlpha VirginisAlpha VolantisAlpha ZetaAlphardAlshemaliAlterfAlungisAmarAmargosaAmiriiAndoriaAngelAntaresArchanisArcherArgeliusArgelius BAridedAviorAxanarAzhaAzraga the galaxy's Beta Quadrant icon image.
Alpha and Beta Quadrant stars and star systems (0-9)
00 Raskae Majoris5 Arietis6 Arietis6-156-237 Ursae Minoris12 Lyncis13 Arietis19 Tauri22 Hydrae22 Ophiuchi25 Tauri34 Kraol37 Cassiopeiae43 Aquarii43 Geminorum47 Draconis55 Terae Majoris56 Arietis57 Arietis61 Ursae Majoris66 Imora74 Tauri77 Ursae Majoris78.56/3.54/23.4483 Beta89 Mell Majoris90 Milenae Majoris99 Pegasi114 Delta114 Trianguli128 Trianguli334 Scorpii415 Arietis780 Arietis4725 CancriSystem 330System 7348 the galaxy's Alpha and Beta Quadrant icon image.
Alpha Quadrant stars and systems (0-9) 1 Herculis2 Ophiuchi3 Coronae Borealis4 Aurigae5 Coronae Borealis6 Delphini7 Aurigae7 Delphini8 Aurigae8 Canum Venaticorum10 Canum Venaticorum10 Lyrae11 Lacerti12 Canum Venaticorum12 Draconis13 Aurigae13 Draconis14 Draconis14 Lyrae15 Lyncis15 Sagittae15 Virginis16 Boötis16 Ceti16 Cygni17 Andromedae17 Aquilae17 Piscis Austrini18 Cygni20 Draconis20 Lyrae21 Andromedae (21 Andromedae A21 Andromedae B) • 21 Boötis23 Draconis23 Serpentis24 Cassiopeiae26 Pegasi27 Boötis27 Herculis27 Ophiuchi30 Boötis31 Aquilae33 Aurigae33 Draconis34 Aquarii34 Aurigae35 Ophiuchi37 Cygni37 Serpentis38 Sagittarii40 Capricorni42 Boötis43 Andromedae44 Persei46 Andromedae50 Aquilae50 Cygni50 Serpentis51 Pegasi53 Aquarii53 Aquilae56 Aurigae57 Andromedae57 Serpentis59 Aquarii61 Cygni61 Draconis63 Draconis65 Herculis70 Ophiuchi86 Ceti92 Herculis94 Aquarii99 Herculis112 Tauri218 Persei329 Aurigae492 Lyncis1440 Ophiuchi (1440 Ophiuchi B) • 1616 Ophiuchi1865 Serpens4408 Trianguli the galaxy's Alpha Quadrant icon image.
Beta Quadrant stars and systems (0-9) 1 Centauri1 Corvi1 Orionis2 Corvi3 Canis Minoris3 Eridani4 Leonis5 Virginis7 Crateris8 Monocerotis10 Canis Minoris11 Hydrae13 Crateris13 Eridani13 Leporis14 Cancri14 Eridani14 Leonis15 Leporis16 Cancri17 Circini17 Pavonis18 Eridani19 Canis Majoris20 Librae23 Eridani24 Geminorum24 Leonis24 Orionis25 Canis Majoris26 Monocerotis26–27 Crucis27 Geminorum30 Hydrae31 Canaris / 31 Canis Majoris32 Pictoris34 Crucis34 Eridani34 Fornacis36 Leonis38 Eridani38 Lyncis40 Eridani (40 Eridani A40 Eridani B40 Eridani C) • 43 Pavonis46 Orionis54 Geminorum54 Orionis59 Eridani65 Cancri65 Fornacis66 Geminorum67 Eridani67 Virginis70 Leonis70 Ophiucus74 Orionis75 Geminorum78 Geminorum78 Pavonis82 Eridani83 Leonis (83 Leonis A83 Leonis B) • 87 Tauri88 Eridani88 Pavonis89 Carinae94 Leonis111 Pavonis113 Pavonis127 Scorpii128 Pavonis128 Trianguli198 Eridani1020 Octantis1212 Muscae4403 Pavonis the galaxy's Beta Quadrant icon image.

Background[]

In ST video game: Starfleet Command III gameplay, the system name of Achird was part of a list that were applied to systems on the game map, with random attributes assigned to them.

References[]

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