Αα Alpha was a letter in the Greek alphabet of Earth, originating in the early period of Human history.

It was used in the following contexts:

Astronomical nomenclature

• Alpha Aquilae, a planetary system
• Alpha Ataru, a location
• Alpha Aurigae, a planetary system
• Alpha Bayard, a location
• Alpha Beaird, a location
• Alpha Berman, a location
• Alpha Boötis, a planetary system
• Alpha Brown, a location
• Alpha Canis Majoris, a planetary system
• Alpha Canis Minoris, a planetary system
• Alpha Canum Venticorum, a planetary system
• Alpha Chamaeleontis, a star system
• Alpha Comae Berenices, a star system
• Alpha Cooper, a location
• Alpha Coronae Borealis, a star system
• Alpha Crum, a location
• Alpha Eridani, a planetary system
• Alpha Fornacis, a star system
• Alpha Geminorum, a star system
• Alpha Glover, a location
• Alpha Hydri, a star system
• Alpha Johnson, a location
• Alpha Lupi, a star and associated star system
• Alpha Lyrae, a planetary system
• Alpha McCusker, a location
• Alpha Mensae, a star system
• Alpha Meyers, a location
• Alpha Peets, a location
• Alpha Pegasi, a star system
• Alpha Phoenicis, a star system
• Alpha Pictoris, a star system
• Alpha Piller, a star system
• Alpha Piscis Australis, a star system
• Alpha Piscium, a star system
• Alpha Saunders, a location
• Alpha Shiro, a location
• Alpha Suhr, a location
• Alpha Trianguli, a star system
• Alpha Ursae Majoris, a planetary system
• Alpha Volantis, a star system
• Alpha Wright, a location

Cardassian terminology

• Alpha Red priority mission, a Cardassian military directive

Cartography

• Alpha Quadrant, a quarter of the Milky Way Galaxy
• Kavis Alpha sector, a region of space

Chemistry

• Hydrogen-alpha emission, an emission line created by hydrogen atoms

Colonies

• Colony Alpha 5, an Earth colony

Food and beverages

• Alpha-currant nectar, a Wadi beverage

Holographic terminology

• Jupiter Station Diagnostic Program Alpha-11, a holographic agent
• Diagnostic routine alpha-three-six, a diagnostic performed on The Doctor's mobile emitter
• Emergency procedure alpha two, a main computer bypassing procedure
• Various holodeck programs, including:
  • Diplomacy scenario 12-alpha
  • Insurrection Alpha
  • K'mtar Alpha-One
  • Paris Program Alpha-1
  • Seven of Nine Alpha-3

Legal terminology

• Statutes of Alpha III
• Treaty of Alpha Cygnus IX
• Tribunal of Alpha III

Medical terminology

• Alpha wave, a brain wave pattern
  • Alpha-wave inducer
• Theta 12 alpha, a drug devised by The Doctor to combat Vulcan pon farr

Planets

• Alfa 177
• Alpha III
• Alpha VII
• Alpha Balder IV
• Alpha Braga VII
• Alpha Carinae II
• Alpha Carinae V
• Alpha Cygnus IX
• Alpha Delphi IX
• Alpha Drapanas
• Alpha Echevarria IV
• Alpha Eridani II
• Alpha Fernandes III
• Alpha Laputa IV
• Alpha Majoris I
• Alpha Omicron VII
• Alpha Onias III
• Alpha Roller II
• Alpha Rossi
• Alpha Zayra II
• Ceti Alpha V
• Ceti Alpha VI
• Doctari Alpha
• Faan Alpha
• Kavis Alpha IV
• Planet 1865-Alpha
• Tau Alpha C
• Zeta Alpha II

Planetoids

• Alpha 441
• Alpha moon, aka Peliar Zel Alpha, a natural satellite of Peliar Zel
• Memory Alpha

School

• University of Alpha Centauri

Ships

• Alpha Nine, an attack raider used by the Maquis
• Alpha Seven, an attack raider used by the Maquis
• NX-Alpha, test vessel of the NX Program

Space station

• Lya Station Alpha, a Starfleet space station

Star systems

• Alpha Centauri
• Alpha Circini
• Alpha Doradus system
• Alpha Gruis
• Alpha Indi
• Alpha Leonis system
• Alpha Omicron system
• Alpha Onias system
• Alpha Ophiuchi
• Alpha Serpentis
• Ceti Alpha star system
• Dikon Alpha system
• M24 Alpha system
• Nequencia Alpha system

Starfleet terminology

• Alpha-47 authorization, a Starfleet security protocol
• Alpha search pattern, a Starfleet procedure
• Alpha shift, the first shift or watch on a Starfleet starship
• Code 1-Alpha-Zero, a ship in distress code
• Pattern Riker Alpha, a Starfleet standard maneuver, developed by William T. Riker
• Seven-Alpha, a evasive maneuver executed by Captain Georgiou

Stars

• Alpha Caeli
• Alpha Carinae
• Alpha Centauri C (Alpha Proxima)
• Alpha Leonis
• Alpha Majoris
• Alpha Monocerotis
• Alpha Tauri
• Ceti Alpha
• Dikon Alpha, a class nine pulsar

Titles

• Alpha, a Jem'Hadar soldier bred in the Alpha Quadrant
• Alpha Hirogen, leader of a Hirogen pack

Miscellaneous

• Alpha k, a bandwidth
• Doctor Alpha, a music program
• 56 alpha, an audio file