How many star systems are in the Star Wars galaxy?

There are at least 460 named planets, making it impossible (or at least extremely difficult) to list them all here.

23 Mere, 244Core, Aaeton, Aaghra, Aar, Aargau, Aargonar, Aaris III, Abanol, Abatrarg, Abbaji, Ab'Bshingh, Abhean, Abo Dreth, Abonshee, Abraxas, Abraxin, Abregado-dai, Abregado-fus, Abregado-rae, Abregado-san, Abregado-taki, Abridon, Abrion Major, Absit, Abyssissa, Acatal, Acherin, Achillea, Acilaris, Acorvus, Adamastor, Adari, Adarlon, Adim, Adin, Adinai, Adner, Adoris, Adriana, Aduba-1, Aduba-2, Aduba-3, Aduba-4, Aduba-5, Aduba-6, Adumar, Aefao, Aesolian, Aeten II, Af'El, Affa, Agamar, Agon Nine, Agora, Agridorn, Agriworld-2079, Aguarl III, Ahakista, Ahlenn, Ahug, Aida, Aikhibba, Ailon, Akana, Akatoa, Akrit'tar, Akuria II, Alabash, Alaris, Alashan, Alassa Major, Alba-16, Albecus, Albrae-Don, Alc, Alderaan, Alderath, Aldereen, Aldivy, Aldraig IV, Aleen, Aleron, Alfestril, Algara II, Algara V, Algara VI, Algor, Alis Point, Alisandor, Alk'lellish III, Alkur, Allandor, Allanteen Six, Alliga, Alluuvia, Allyuen, Almak, Almania, Almar, Almas, Al'Nasrl, Alorthas, Alpheridies, Alsakan, Altair 3, Altair 9, Altarrn, Altawar, Althir, Altier, Altor 14, Altora, Altratonne, Altrax, Altyr V, Alurion, Alvor, Alvorine,

Alzar, Alzoc III, Amador, Amaltanna, Amara, Amarin, Ambria, Amfar, Ammuud, Amorphiia, Amorris, Ampliquen, Amrap, Amthau, Anantapar, Ananuru, Anarak IV, Anaxes, Anchoron, Andando, Andara, Andasala, Andinri, Ando, Ando Prime, Andooweel, Andosha II, Andowyne, Andra, Anemcoro, Angratha, Anic, Ank Ki'Shor, Ank Kit'aar, Ankus, Annaj, Annoo, Anoat, Anobis, Anoth, Ansarra, Ansek, Ansillivog, Ansion, Antar, Antared III, Anteevy, Antemeridias, Antipose IX, Antipose XII, Antiquity, Antmuel VI, Anx Minor, Anzat, Aparo, Apatros, Apgar, Aphran IV, Apliria, Aquaris, Aquella, Aquilae, Aquilaris, Arabanth, Aracara, Aradian, Aralia, Aram, Arami, Arapia, Arat Fraca, Arbra, Arbran I, Arbran III, Arbran IV, Arbran V, Arbran VI, Arcadia, Arcan IV, Archae Teuthis, Arcopola, Arcura, Arda-1, Arda-2, Arda-3, Arden, Argai, Arganu, Argavat, Argazda, Argoon, Argovia, Argus, Aridus, Aris, Aris V, Arjus, Arkania, Arkanis, Arkonne III, Arkuda, Armath, Arodoni, Arorua, Arporatal-Lanin, Arrakan, Arramanx, Arrgaw, Arro,

Arsteni, Arthézia, Arthon, Artorias, Artus Prime, Aruza, Arzid, Asamin, Asation, Ash, Ashas Ree, Ashash, Asher III, Asimuse, Askaj, Asmall, Asmeru, Asran, Asrat, Ast Kikorie, Atapap I, Ather, Athiss, Atloran, Ator, Atraken, Atrisia, Atrivis, Atrivis 7, Attahox, Atzerri, Aurea, Averam, Averill, Aviles Prime, Aviprine, Avirandel, Avishan, Avon, Axion, Axtria, Axum, Axxila, Azameen, Azbrian, Azna, Aztubek, and Azure.