IAU nomenclature: Abbe Abbot Abel Abenezra Abetti Abul Wáfa Abulfeda Abulfeda crater chain (Catena Abulfeda) Acosta Adams Aepinus Aestatis, Lacus Aestuum, Sinus Agarum, Promontorium Agassiz, Promontorium Agatharchides Agatharchides, Rima Agnes, Mons Agricola, Montes Agricola, Rima Agrippa Airy Aitken Akis Alan Al-Bakri Albategnius Albert (Luna-17 site) Al-Biruni Alden Alder Aldrin Aldrovandi, Dorsa Alekhin Alexander Alfraganus Alhazen Aliacensis Al-Khwarizmi (aka Arabia) Al-Khwarizmi-King (basin) Almanon Al-Marrakushi Aloha Alpes, Montes Alpes, Vallis Alpetragius (aka Egg-in-a-Nest) Alphonsus Alphonsus, Rimae Alpine Valley (Vallis Alpes) Alpine Valley Central Rille Altai, Rupes Alter Ameghino Amici Ammonius Amontons Amoris, Sinus Ampère, Mons Amundsen Amundsen-Ganswindt (basin) Anaxagoras Anaximander Anaximenes Andel Anders Anderson Andersson André, Mons Andronov Andrusov, Dorsa Ango Angström Anguis, Mare Ann Annegrit Ansgarius Antoniadi-/ (Basin) Anuchin Anville Apennine Bench Formation Apennine Front (Apollo-15 site) Apennine Mountains (Montes Apenninus) Apianus Apollo-/ (Basin) Apollo 11 Site (Statio Tranquillitatis) Apollo 12 Site (Surveyor crater) Apollo 14 Site (north of Fra Mauro) Apollo 15 Site (near Mons Hadley) Apollo 16 Site (near Descartes and Dollond) Apollo 17 Site (Taurus-Littrow Valley) Apollonius Apollonius, Rimae Appleton Appleton-Tsu Basin-/ Arago Aratus Aratus CA (LTO: Lorca) ("Krishna" on Rukl's chart 23) Archerusia, Promontorium. Archimedes Archimedes, Montes (aka Montes Lomonosov) Archimedes, Rimae Archytas Archytas, Rima Ardeshir, Mons Arduino, Dorsum Argaeus, Mons Argand, Dorsa Argelander Ariadaeus Ariadaeus, Rima Aristarchus Aristarchus Plateau (aka Wood's Spot) Aristarchus Rilles (Rimae Aristarchus) Aristillus Aristoteles Arminski Armstrong Arnold Arrhenius Artamonov Artamonov, Catena Artem'ev Artemis Artsimovich Artsimovich, Rima Aryabhata Arzachel Arzachel, Rimae Asada Asclepi Ashbrook Asperitatis, Sinus Aston Atlas Atlas, Rimae Atwood Australe, Mare (Basin) Autolycus Autumni, Lacus Auwers Auzout Avery Avicenna Avogadro Azara, Dorsum Azophi
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'Unofficial nomenclature: Abarim, Mons (IAU: crater chain Ball-Pitatus) Abbe, Vallis (east of Abbe) Abduh (Lyell A) Abineri (Strabo A) Acabe, Mons (IAU: Byrgius and bright nimbus) Aconitus collis (IAU: Boscovich) Adlunationis, Sinus (Planitia Descensus, Luna 9 site) Adriaticum, Mare (IAU: Sinus Medii + SE Sinus Aestuum) Adriaticus, Portus (Rukl: 41/52) Aea, Insula (IAU: Cauchy) Aegyptiacum, Mare (IAU: part of southern Oceanus Procellarum) Aegyptus (regio) (IAU: southwestern highlands) Aemus (or Haemus) (IAU: Alexander) Aerii, Montes (IAU: western end of Montes Carpatus) Aestuaria Bamelrodia (IAU: Palus Somni) Aestuum Pyroclastics (see Aestuum, Sinus) Aethusa, Insula (bright spot SW of Lansberg D) Aetna, Mons (IAU: Copernicus) Africae pars (IAU: far western highlands) Agassiz (Apollo-17 site) Agricola (Apollo-17 site) Agricola Straits (see Agricola, Montes) Air bubbles (the western end of Rupes Cauchy) Airy swirl (see Airy) Ajax, Mons (IAU: Cavendish) Alabastrinus, Mons (IAU: Lichtenberg's bright nimbus) Alani, Montes (northern rim of Mare Crisium) Alani's bright spot (high-albedo craterlet in Hewelcke's Mts.Alani) Alaunus, Mons (IAU: Plutarch and Seneca) Albategni (IAU: Euctemon?) Alberti, Promontorium S. (Rukl: 24/25) Rima Albin / Rupes Albin (south of Lansberg) Alcuinus (Lubbock N) Aldrin (IAU: Langemak N) Alfonsi IX Reg. Cast. (IAU: Democritus) Alfred Worden's chain (chain of craterlets west of Gruithuisen) Aller (IAU: Atwood) Alligator chain (Apollo-15 site) Alopecia, Insula (IAU: Picard) Alpha Reed, Vallis (see Mare Ingenii and Rima Paracelsus M) Alser's alien / Shoeprint (in Robinson) Alta Vista (see Teneriffe, Montes) Alter (Albategnius G) Al-Tusi (King Y) (see link below list) Amadoca, Palus (IAU: Mare Humboldtianum) Amadoci, Montes (IAU: Messala area) Amalfi (IAU: Barrow) Amanus, Mons (IAU: Delambre) Amara Mons (location unknown) Amarae, Paludes (IAU: Mare Spumans and Mare Undarum) Amari, Fontes (IAU: Cruger's dark floor) Ambenus, Mons (IAU: bright ray Mason-Mare Frigoris) America (IAU: Korolev) Amphitheater (part of Vallis Alpes) Amundsen (IAU: Scott) Ancient Newton Ancient Thebit (see Recta, Rupes) Anders (IAU: Backlund) Anderson finger (Anderson L) Andes mountains (see Humboldtianum, Mare) Andradae (IAU: Mare Crisium Omega) Andreus Hills (see Herigonius) Anemusa, Insula (IAU: bright spot north of Lansberg)(?) Annae, Mons (IAU: Longomontanus and Wilhelm) Annae D. Aurel. F. (IAU: Caucasus Gamma) ANNAE Reg. Fran. (IAU: Arzachel) Annulatum, Mare (IAU: Mare Orientale) Annulus Concordiae (between Mts.Cordillera and Mts.Rook) Annulus Neptuni (IAU: Gassendi) Anselmi Elect. Mogunt. (IAU: Casatus) Antaristarchus (Tsiolkovsky, the dark antipode of bright Aristarchus) Anticaspia (IAU: Mare Humorum) Antilibanus (IAU: Aliacensis and Werner) Antitaurus (IAU: chain of Almanon to Playfair) Antoniadi, Rimae (on the N part of Antoniadis floor) Antoniadi (Hecataeus B) Antural (see Riphaeus, Montes) A.Pavlov (unofficial name for crater east of Cyrillus) Apollinis, Promontorium (IAU: Promontorium Laplace?) Apollinis, Sinus (IAU: Sinus Iridum) Apollo, Rimae (at the northern part of basin Apollo) Apollonia, Insula (IAU: Plinius) Apollonia Minor, Insula (IAU: Ross) Apollonius, Fossa Apollo Ridge (A-10 / A-11 region) Apollo Rille (A-10 / A-11 region) Appalaches, Rupes (discontinued name, see Al-Khwarizmi) Arabia (regio) (IAU: SSW limb area) Arabia (IAU: Al-Khwarizmi) Arabiae, Paludes (IAU: dark area De Gasparis - Palmieri) Arago Domes (Arago Alpha and Beta) Arago 5 (small field of Irregular Mare Patches SE of Maclear / SW of Ross H) Arati (IAU: Plato Tau) Arbeit (Apollo-15 site) Archerusia, Palus (IAU: Julius Caesar) Archidaeum, Promontorium (see Berzelius and Geminus) Archimedes, Fossa (Caes's Catena Beer) Archimedis (IAU: Teneriffe Iota) Arcuate fractures (south of Arago) Areesa, Palus (IAU: dark area SW of Fracastorius) Arenbergii (IAU: Murchison and Pallas) Argaeus's elongated depression (WSW of Mons Argaeus) Argentarius, Mons (IAU: Archimedes) Argolii, Promontorium (IAU: ESE Santbech) Arietis, Promontorium (IAU: near Vitruvius) Ariosto (Hirayama C) Aristarchi (IAU: Archytas) Aristarchus, Collis Aristarchus North (small field of Irregular Mare Patches NNE of Aristarchus) Aristillus's ghost (ghost-crater immediately north of Aristillus) Aristoteles, Catena (once known as Rima Aristoteles) Armeniae, Montes (IAU: Gemma Frisius and Goodacre) Armenter (-898/ +426) Arms (Apollo-17 site) Armstrong (IAU: Langemak) Arondelii (IAU: Lexell A) Arrhentias, Insula (IAU: bright area north of Moltke) Arrowhead, The (Mons Hansteen) Arrowhead (Apollo-15 site) Artamonov's unnamed companion (the unnamed crater north of Artamonov) Artemis/Felix/Verne cluster (irregular cluster of craterlets in Mare Imbrium) Arthur (Anaximander C) Artsimovich's arrowhead (ENE of Artsimovich) Arzahel, Promontorium (Rukl: 48) Arzet (IAU: Zach?) Asada, Rima (south of Asada) Asiae pars (IAU: probably SSE limb area) Asia Minor (regio) (IAU: central highlands) Astronautorum, Sinus (south of Komarov) Astronomicum, Mare (IAU: Mare Frigoris) Ataturk (Romer A) Atheniensis, Sinus (IAU: Sinus Asperitatis) Athinagoras (Geminus A) Athlanticus, Sinus (IAU: Eratosthenes, Timocharis) Athos, Mons (IAU: Euclides bright nimbus) Atlas's companion / Atlas bright spot (high-albedo spot E. of Atlas) Atlas Major (IAU: Bouguer and La Condamine) Atlas Minor (IAU: Sharp and Sharp B) (Wilkins's Aymat) Auberi (IAU: Nicolai) Audus, Mons (IAU: Reiner Gamma, with Reiner?) Augustini, Flumen S. (IAU: Zupus region) Aureus, Mons (IAU: Egede A bright nimbus) Austen (Hirayama M) Austriaci, Montes (IAU: Montes Apenninus) Austriacum, Mare (IAU: Mare Imbrium) Auwers Tholus (dome south of Auwers) Avani's ghost / Avani Soares's ghost (near Wollaston D) Avis, Mare (location unknown) Aymat (Sharp B) Aytona (= Nachara) (IAU: Montes Harbinger Beta)
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