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American Assn. of Variable Star Observers
American Association of Amateur Astronomers
American Astronomical Society
American Lunar Society
American Meteor Society, Ltd.
Antique Telescope Society
Association of Lunar and Planetary Observers
Astronomical League
Astronomical Society of the Pacific Foro Astronomía Observacional100
Astronomy Day Headquarters
International Association for Astronomical Studies
International Astronomical Union
International Dark-Sky Association11,000
International Meteor Organization250
International Occultation Timing Association
Night Skies Network9681
North American Meteor Network
Oregon Star Party1000
RTMC Astronomy Expo
Society of Amateur Radio Astronomers
Texas Star Party
The Royal Astronomical Society of Canada (RASC)
The SETI League, Inc.
Visual Satellite Observers (appears dormant)



AuburnAuburn Astronomical Society
FlorenceShoals Astronomy Club
FlorenceUNA Astronomy Club  →
HueytownBirmingham Astronomical Society79
HuntsvilleVon Braun Astronomical Society
MobileMobile Astronomical Society 
TuscaloosaThe Astronomical Society of Tuscaloosa  


FairbanksFairbanks Astronomy Unit 
Yahoo GroupAlaskan Astronomy Group


ClarkdaleAstronomers of Verde Valley
FlagstaffCoconino Astronomical Society
Green ValleySonora Astronomical Society (SAS)180+
Heber-OvergaardHeber-Overgaard Astronomy Club30
Oro ValleySun City Astronomy Club
PhoenixEast Valley Astronomy Club
PhoenixPhoenix Astronomical Society60
PhoenixSaguaro Astronomy Club
PrescottPrescott Astronomy Club65
SedonaSirius Lookers of Sedona
Sierra VistaHuachuca Astronomy Club
Sun City WestAstronomy Club of Sun City West  →
SurpriseWest Valley Astronomy Club
TucsonTucson Amateur Astronomy Assn.
TucsonUniversity of Arizona Astronomy Club
YumaYuma Astronomy Club
EagarWhite Mountains Astronomy Club  
KingmanHigh Desert Astronomy Club 
Lake Havasu CityLake Havasu Astronomy Club  


Bella VistaSugar Creek Astronomical Society
Little RockCentral Arkansas Astronomical Society
NashvilleRed River Astronomy CLub
RussellvilleRiver Valley Stargazers
Van BurenArkansas-Oklahoma Astronomical Society41
FayettevilleAstronomical Society of Northwest Arkansas  
Hot Springs VillageHot Springs Village Star Gazers  
Siloam SpringsChristian Association of Stellar Explorers  
State UniversityNortheast Arkansas Sky Crew  


Apple ValleyHigh Desert Astronomical Society
AptosCabrillo Astronomy Club -
BakersfieldKern Astronomical Society, Inc.
BerkeleyAstronomical Association of Northern California
Big Bear LakeBig Bear Valley Astronomical Society
BishopWhite Mountain Astronomers 
ClaremontPomona Valley Amateur Astronomers60
ConcordMount Diablo Astronomical Society
Costa MesaOrange County Astronomers850+
DavisAstronomy Club of the U C Davis
DavisDavis Astronomy Club
EurekaAstronomers of Humboldt25
FresnoCentral Valley Astronomers, Inc.60
HerculesHercules Stargazers
HollywoodThe Sidewalk Astronomers
Joshua TreeSouthern California Desert Video Astronomers
KernvilleKern River Valley Astronomy Club
Lake ArrowheadMountain Skies Astronomical Society
LancasterAntelope Valley Astronomy Club
LivermoreTri-Valley Stargazers
Los Altos HillsPeninsula Astronomical Society
Los AngelesLos Angeles Astronomical Society
Los GatosThe Astronomy Connection
MarinaMIRA Observers Group
MercedM-STAR Astronomy Club 
OaklandEastbay Astronomical Society
Palm DesertAstronomical Society of the Desert
PalmdaleAntelope Valley Astronomy Club, Inc
PasadenaMount Wilson Observatory Assn. 
Rancho CaliforniaTemecula Valley Astronomers
ReddingShasta Astronomy Club
RiversideRiverside Astronomical Society285
SacramentoSacramento Valley Astronomical Society
San BernardinoSan Bernardino Valley Amateur Astronomers
San DiegoSan Diego Astronomy Association600
San DiegoSchwartz Astronomical Society3
San FranciscoSan Francisco Amateur Astronomers
San JoseHalls Valley Astronomical Group25
San JoseSan Jose Astronomical Association
San Juan BautistaFremont Peak Observatory Association175
San LeandroGroup 70 -- Large Amateur Telescope Project
San Luis ObispoCentral Coast Astronomical Society
San MateoSan Mateo County Astronomical Society110
Santa BarbaraSanta Barbara Astronomical Unit
Santa ClaritaLocal Group Astronomy Club
Santa CruzSanta Cruz Astronomy Club
Santa MonicaSanta Monica Amateur Astronomy Club
Santa RosaSonoma County Astronomical Society150
Simi ValleyVentura County Astronomical Society
StocktonStockton Astronomical Society
TehachapiGreater Tehachapi Astronomy Club
TemeculaFirstLight Astronomy Club 
TemeculaStony Ridge Observatory, Inc.
TorranceSouth Bay Astronomical Society
Van NuysLos Angeles Valley College Astronomy Group
Vandenberg AFBVandenberg Amateur Astronomical Society
VisaliaTulare Astronomical Association
Walnut creekMount Diablo Observatory Association  →
Yucca ValleyThe Andromeda Society
ArcataArcata Society for Amateur Astronomers  
BlytheColorado River Astronomy Club  
BreaGolfing Astronomer Musician's Association  
ChatsworthCelestial Observers  
CypressWestern Observatory Astronomy Society  
Glen EllenValley of the Moon Astronomical Society  
IdyllwildIdyll-Gazers Amateur Astronomy Club  
LakewoodExcelsior Telescope Club  
Lockwood ValleyOne club that requests to be unlisted  
Long BeachLong Beach Astronomical Socity  
Los AngelesClear Nights 
Los AngelesThe Astronomy Forum 
MantecaManteca Observer's Group  
Mill ValleyMarin Stargazers  
ModestoGreat Valley Astronomy Club  
ModestoStanislaus Amateur Astronomers  
MoorparkOne club that requests to be unlisted  
Oceanside (San Diego)Oceanside Photo & Telescope Astronomical Society  
Palm DesertSun City Palm Desert Astronomy Club  
RidgecrestChina Lake Astronomical Society  
SacramentoSidewalk Astronomers of Sacramento  
San DiegoNot When the Surf's Up Amateur Astronomers Group  
San FranciscoSan Francisco Sidewalk Astronomers 
San MateoCCFF Astronomy Club  
Sherman OaksSherman Oaks Astronomers Group  
Simi ValleySouthern California Observers  
South Lake TahoeLake Tahoe Astronomers  
SpringvilleTule River Amateur Astronomers  
UkiahUkiah Astronomical Society  
WhittierRio Hondo Astronomical Society  


BoulderBoulder Astronomy & Space Society
Colorado SpringsColorado Springs Astronomical Society
DenverDenver Astronomical Society
DurangoFour Corners Stargazers
Fort CollinsNorthern Colorado Astronomical Society
Grand JunctionWestern Colorado Astronomy Club24
LongmontLongmont Astronomical Society
MontroseBlack Canyon Astronomical Society
PuebloSouthern Colorado Astronomical Society
Glenwood SpringsThree Rivers Astronomy Club  
Grand JunctionPalisade Astronomy Connection  
GunnisonGunnison Valley Astronomical Society  
PuebloRocky Mountain Astronomy Club  
San AnselmoTamalpais Astronomical Society  
Steamboat SpringsYampa Valley Astronomy Club  


HartfordAstronomical Society of Greater Hartford
New HavenAstronomical Society of New Haven, Inc.
NoankThames Amateur Astronomical Society
StratfordBoothe Memorial Astronomical Society
TorringtonLitchfield Hills Amateur Astronomy Club
WestportWestport Astronomical Society


SmyrnaDelmarva Star Gazers
WilmingtonDelaware Astronomical Society

District of Columbia

College Park, MDNational Capital Astronomers


BradentonLocal Group of Deep Sky Observers
CocoaBrevard Astronomical Society
Fort LauderdaleSouth Florida Amateur Astronomers Assn.
Fort MyersSouth West Florida Astronomical Society
Fort PierceTreasure Coast Astronomical Society45
GainesvilleAlachua Astronomy Club, Inc.
JacksonvilleNortheast Florida Astronomical Society, Inc.
MelbourneFIT Astronomy Society
MiamiSouthern Cross Astronomical Society
NaplesEverglades Astronomical Society
Panama CityAstronomical Society of Bay County12
PensacolaEscambia Amateur Astronomers Assn.
St. PetersburgSt. Petersburg Astronomy Club, Inc.
TallahasseeTallahassee Astronomical Society
TampaMARS Astronomy Club
TitusvilleKennedy Space Center Amateur Astronomers30
West Palm BeachAstronomical Society of the Palm Beaches
Winter ParkCentral Florida Astronomical Society
SebringHighlands Stargazers  
Winter HavenWinter Haven Astronomy Club  


Atlanta/MariettaAtlanta Astronomy Club, Inc.
AugustaAstronomy Club of Augusta
GainesvilleNorth Georgia Astronomy Club60
GriffinFlint River Astronomy Club
MaconMiddle Georgia Astronomical Society30
SavannahOglethorpe Astronomical Assn.
SharonDeerlick Astronomy Village
StatesboroGalloway Amateur Astronomy Club 
StatesboroStatesboro Astronomy Club
MaconMacon State College Astronomy Club  
TiftonSouthern Georgia Astronomers - SGA  


HonoluluHawaiian Astronomical Society


BoiseBoise Astronomical Society
Idaho FallsIdaho Falls Astronomical Society40
JeromeMagic Valley Astronomical Society


AltonSt. Louis Astronomical Society
BataviaFox Valley Astronomical Society
CarbondaleAstronomical Association of Southern Illinois30
ChampaignChampaign-Urbana Astronomical Society
ChicagoChicago Astronomer370
ChicagoChicago Astronomical Society
ChicagoRyerson Astronomical Society
DecaturDecatur Area Astronomy Club 
DeerfieldSkokie Valley Astronomers45
KankakeeKankakee Area Stargazers45
NapervilleNaperville Astronomical Assn.
NormalTwin City Amateur Astronomers, Inc.
PeoriaPeoria Astronomical Society, Inc.
Rock IslandPopular Astronomy Club, Inc.
SchaumburgNorthwest Suburban Astronomers
SpringfieldSangamon Astronomical Society
UrbanaAstronomical Society at Univ. of Illinois
VoloLake County Astronomical Society90
DixonNorthern Illinois Stargazers  


ColumbusColumbus Astronomy Club
EvansvilleEvansville Astronomical Society, Inc.
Fort WayneFort Wayne Astronomical Society, Inc.
GriffithCalumet Astronomical Society75
MooresvilleIndiana Astronomical Society, Inc.150
South BendMichiana Astronomical Society20
West LafayetteWabash Valley Astronomical Society
Winona LakeWarsaw Astronomical Society
WabashWabash County Astronomical Society  


AmesAmes Area Amateur Astronomers
Cedar RapidsCedar Amateur Astronomers, Inc.
Des MoinesDes Moines Astronomical Society, Inc.
Des MoinesDes Moines Astronomy Club
West BurlingtonSoutheast Iowa Astronomy Club 


LawrenceAstronomy Associates of Lawrence
SalinaSalina Astronomy Club
TopekaNortheast Kansas Amateur Astronomers' League, Inc.
WichitaKansas Astronomical Observers
TopekaHeartland Astronomical Research Team  


Dawson SpringsWestern Kentucky Amateur Astronomers
LexingtonBlue Grass Amateur Astronomy Club
LouisvilleLouisville Astronomical Society100
Pine KnotBig South Fork Star Gazers
StaffordsvilleEastern Kentucky Astronomy Connection 
HuntingtonOhio Valley Astronomical Society  


Baton RougeBaton Rouge Astronomical Society, Inc.
New OrleansPontchartrain Astronomy Society, Inc.
ShreveportShreveport-Bossier Astronomical Society, Inc.


BangorPenobscot Valley Star Gazers
BoothbayCentral Maine Astronomical Society30
KennebunkportAstronomical Society of Northern New England
PembrokeDowneast Amateur Astronomy Club


BaltimoreBaltimore Astronomical Society
Bel AirHarford County Astronomical Society
CentrevilleNorthern Virginia Astronomy Club
ColumbiaHoward Astronomical League
FrostburgCumberland Astronomy Club
GreenbeltGoddard Astronomy Club
HagerstownTri-State Astronomers25
LanhamGreenbelt Astronomy Club
SykesvilleWestminster Astronomical Society
White PlainsSouthern Maryland Astronomical Society


AmherstAmherst Astronomy Assn.
BostonBoston University Astronomical Society
Boston & WestfordAmateur Telescope Makers of Boston, Inc.
BrewsterCape Cod Astronomical Society
EdgartownMartha's Vineyard Astronomy Club
GloucesterGloucester Area Astronomy Club
GrovelandNorth Shore Amateur Astronomy Club117
NorwellSouth Shore Astronomical Society35
PaxtonAldrich Astronomical Society50
RehobothAstronomical Society of Southern New England
SpringfieldSpringfield Stars Club75
PittsfieldPittsfield Astronomy Club  
PlymouthBay Colony Astronomical Society  


Ann ArborUniversity of Michigan Student Astronomical Societ
DearbornFord Amateur Astronomy Club153
DexterUniversity Lowbrow Astronomers
East LansingCapital Area Astronomy Club
Grand RapidsGrand Rapids Amateur Astronomical Association.
HollandShoreline Amateur Astronomical Association20
JacksonAmateur Astronomers of Jackson28
KalamazooKalamazoo Astronomical Society
MidlandSeven Ponds Astronomy Club
MidlandSunset Astronomical Society
MuskegonMuskegon Astronomical Society
Rochester HillsOakland Astronomy Club25
RockwoodSirius Stargazers
Traverse CityGrand Traverse Astronomical Society
WarrenWarren Astronomical Society
YpsilantiEastern Michigan Univ. Astronomy Club
FlintGenesee Astronomical Society  


DuluthArrowhead Astronomical Society, Duluth MN20
Minneapolis and St. PaulMinnesota Astronomical Society400
MoorheadFargo-Moorhead Astronomical Club15


French CampRainwater Astronomers Assn.30
JacksonJackson Astronomical Association


Blue SpringsAstronomical Society of Kansas City
ColumbiaCentral Missouri Astronomical Association
SpringfieldSpringfield Astronomical Society
St. LouisSt. Louis Astronomical Society, Inc.
WashingtonEastern Missouri Dark Sky Observers
SpringfieldOzarks Amateur Astronomers Club  


BillingsYellowstone Valley Amateur Astronomers
BozemanSouthwest Montana Astronomical Society
KalispellBig Sky Astronomy Club
MissoulaWestern Montana Astronomical Association


LincolnPrairie Astronomy Club
OmahaOmaha Astronomical Society90
ScottsbluffPanhandle Astronomy Club  


HendersonAstronomical Society of Nevada, Las Vegas
Las VegasLas Vegas Astronomical Society
Reno, Tonopah, Las VegasAstronomical Society of Nevada
TonopahTonopah Astronomical Society  

New Hampshire

AlsteadKeene Amateur Astronomers, Inc.
ManchesterNew Hampshire Astronomical Society150

New Jersey

BoontonSheep Hill Astronomical Association
CliftonNorth Jersey Astronomical Group50
ClosterRockland Astronomy Club
CranfordAmateur Astronomers, Inc.221
East HanoverSkyland Stargazers15
GloucesterWillingboro Astronomical Society  →
Gloucester CityWest Jersey Astronomical Society
High BridgeNew Jersey Astronomical Assn., Inc.
JamesburgConcordia Astronomy Club 
Little FerrySETI League, Inc.1467
MorristownMorris Museum Astronomical Society25
NewtonMontclair Telescope Club, Inc. 
PiscatawayRutgers Astronomical Society
PrincetonAmateur Astronomers Association of Princeton
Red BankSTAR Astronomy Society, Inc.60
Toms RiverASTRA -Astronomical Society of the Toms River Area75
Upper TownshipSouth Jersey Astronomy Club110
WarrenUnited Astronomy Clubs of New Jersey, Inc.
BridgewaterSomerset County 4-H Space & Astronomy Club  
HowellMonmouth Mobile Observer's Group  
NewtonDark Sky Observers  
PatersonThe Passaic County Astronomical Association  

New Mexico

AlamogordoAlamogordo Astronomy Club 
AlamogordoAmateur Astronomers Group
AlbuquerqueThe Albuquerque Astronomical Society
Las CrucesAstronomical Society of Las Cruces100
Los AlamosPajarito Astronomers
RanchvaleClovis Astronomy Club
Rio RanchoRio Rancho Astronomical Society
RoswellRoswell Astronomy Club
Silver CitySilver City Astronomical Society 
SocorroNew Mexico Tech Astronomy Club 
TaosEl Valle Astronomers 
CorralesRio Grande Astronomical Society (RGAS) 

New York

BuffaloBuffalo Astronomical Association150
ChappaquaWestchester Amateur Astronomers
ClintonMohawk Valley Astronomical Society
JamestownMarshal Martz Memorial Astronomical Assn., Inc.
MassapequaAstronomical Society of Long Island, Inc.
Merrick, Long IslandAmateur Observer's Society of New York, Inc.
New PaltzMid-Hudson Astronomy Assn.75
New YorkAmateur Astronomers Association of New York
NiskayunaAlbany Area Amateur Astronomers, Inc.140+
RochesterRochester's Astronomy Club350
SoutholdCuster Institute Observatory
SyracuseSyracuse Astronomical Society60
TroyRensselaer Astrophysical Society25
VestalKopernik Astronomical Society
IthacaIthaca Amateur Astronomers  
Orange CountyOrange County Astronomical Association 

North Carolina

AshevilleAstronomy Club of Asheville45
Boiling SpringsCleveland County Astronomical Society
Chapel HillChapel Hill Astronomical and Observational Soc.
CharlotteCharlotte Amateur Astronomers Club
ColumbusFoothills Astronomical Society
GreensboroGreensboro Astronomy Club
HickoryCatawba Valley Astronomy Club45
RaleighRaleigh Astronomy Club, Inc.80
RosmanPisgah Astronomical Research Institute
SalisburyAstronomical Society of Rowan County
TroutmanPiedmont Amateur Astronomers
WilmingtonCape Fear Astronomical Society
WilsonTar River Astronomy Club
Winston-SalemForsyth Astronomical Society
Archdale/High PointTriad Action Astronomy Club  
AshevilleStarfax Association  
Winston-SalemLogos Astronomical Society  

North Dakota

Grand ForksNorthern Skies Astronomical Society


AkronAstronomy Club of Akron, Inc.
BellaireNorthern Ohio Valley Astronomical Educators
Chagrin FallsChagrin Valley Astronomical Society40
ColumbusColumbus Astronomical Society
DaytonMiami Valley Astronomical Society110
FindlayMillstream Astronomy Club
HuntingtonOhio Valley Astronomical Society
LakewoodOhio Turnpike Astronomers Assn. 
LimaLima Astronomical Society32
LucasAstronomy For Youth12
MansfieldRichland Astronomical Society
MansfieldSandusky Valley Amateur Astronomy Club
Newton FallsMahoning Valley Astronomical Society
North OlmsteadCuyahoga Astronomical Association
OberlinBlack River Astronomical Society35
TroyStillwater Stargazers
WilmotWilderness Center Astronomy Club
WoosterWayne County Astronomical Society25
BrunswickBrunswick Astronomy Club  
MedinaMedina County Astronomical Society  


Oklahoma CityOklahoma City Astronomy Club
StillwaterTuva Astronomy Club
TulsaAstronomy Club of Tulsa
WanetteOdyssey Astronomy Club  


AshlandSouthern Oregon Skywatchers
BendPine Mountain Observatory
EugeneEugene Astronomical Society
Grants PassGrants Pass Astronomers15
PortlandRose City Astronomers
RoseburgUmpqua Astronomers
BoringMt. Hood Observatory Assn.  
SalemNight Sky 45 Astronomy Club  
VernoniaNorthwest Astronomy Group 


AllentownLehigh Valley Amateur Astronomical Society, Inc.
altoonaStarlight Astronomy Club
AvondaleChester County Astronomical Society
ChalfontBucks-Mont Astronomical Assn.
Clarks SummitLackawanna Astronomical Society100
ConynghamGreater Hazleton Area Astronomical Society30
Franklin/Oil CityOil Region Astronomical Society30
HarrisburgAstronomical Society of Harrisburg
KaneSir Isaac Newton Astronomical Society 
LancasterAstronomy Enthusiasts of Lancaster County
LewisburgSusquehanna Valley Amateur Astronomers 
LimerickChesmont Astronomical Society
NorristownDelaware Valley Amateur Astronomers
PhiladelphiaRittenhouse Astronomical Society
PittsburghAmateur Astronomers Assn. of Pittsburgh, Inc.
University ParkPenn State Astronomy Club -
VillanovaVillanova Astronomical Society
Western PennsylvaniaAmateur Astronomers of Beaver County
WyomissingBerks County Amateur Astronomical Society, Inc.
YorkYork County Astronomical Society
ErieErie County Mobile Observers Group  
SaltsburgThe Kiski School Astronomy Club  
State CollegeCentral Pennsylvania Observers  

Rhode Island

North ScituateSkyscrapers, Inc.
RehobothAstronomical Society of Southern New England
ProvidenceCelestial Observers of Rhode Island  

South Carolina

CharlestonLowCountry Stargazers17
ColumbiaMidlands Astronomy Club80
ColumbusFoothills Astronomical Society 
GreenvilleRoper Mountain Astronomers
SenecaClemson Area Amateur Astronomers
BeaufortBeaufort South Carolina Astronomer  
ColumbiaMidlands Technical College Astronomy Club  
Myrtle BeachGrand Strand Skygazers  
Rock HillCarolina Skygazers Astronomy Club  
SenecaUpstate Astrophotography  

South Dakota

Rapid CityBlack Hills Astronomical Society
Sioux FallsSioux Empire Astronomy Club  


BrentwoodBarnard-Seyfert Astronomical Society
BristolBristol Astronomy Club 
ChattanoogaBarnard Astronomical Society
GallatinCumberland Astronomical Society35
KnoxvilleKnoxville Observers
KnoxvilleSmoky Mountain Astronomical Society
MemphisMemphis Astronomical Society
KingsportBays Mountain Astronomy Club  
ManchesterMiddle Tennessee Astronomical Society  


AlpineBig Bend Astronomical Society  →
AlpineBig Bend Astronomy
AmarilloAmarillo Astronomy Club45
ArlingtonOlympus Mons
AustinAustin Astronomical Society200
DallasTexas Astronomical Society
FlintAstronomical Society of East Texas
Fort WorthFort Worth Astronomical Society, Inc.
GeorgetownWilliamson County Astronomy Club
HoustonFort Bend Astronomy Club
HoustonHouston Astronomical Society250
HoustonJohnson Space Center Astronomical Society
KingwoodNorth Houston Astronomy Club
LeanderAstronomy Students Association - UT/Austin
LubbockSouth Plains Astronomy Club
MidlandWest Texas Astronomers
North Richland HillsWhitney Astronomy
San AngeloSan Angelo Amateur Astronomy Assn.57
San AntonioSan Antonio Astronomical Association
San AntonioSan Antonio Astronomical Observers Group 
VictoriaCrossroads Astronomy Club
WacoCentral Texas Astronomical Society130
Wichita FallsStarlight Observers League - SOL 
College StationAssn. of Amateur Astronomers  
El PasoEl Paso Astronomy Club  
KingsvilleKingsville Astronomical Society  
ShermanAstronomical Society of North Texas  


LindonUtah Valley Astronomy Association  →
LoganCache Valley Astronomical Society
OgdenOgden Astronomical Society
Pleasant GroveUtah Valley Astronomy Club
PriceCarbon County Star Parties230
ProvoBrigham Young University Astronomical Society
Salt Lake CitySalt Lake Astronomical Society
St. GeorgeSt. George Astronomy Group
Park CityUtah Skies  


SpringfieldSpringfield Telescope Makers100
WillistonVermont Astronomical Society
ManchesterHildene Astronomy Club  


BlacksburgAstronomy Club of Virginia Tech
CharlottesvilleCharlottesville Astronomical Society
ChesapeakeNorfolk Astronomical Society25
FincastleRoanoke Valley Astronomical Society
FredericksburgRappahannock Astronomy Club
MiddletownShenandoah Astronomical Society45
RichmondRichmond Astronomical Society
RoanokeStar City Astronomy Network10
Virginia BeachBack Bay Amateur Astronomers
FranklinSouthampton Astronomers  
HamptonSkywatchers Astronomy Club  


Bainbridge IslandBattle Point Astronomical Assn.
BellevueEast Side Astronomical Society
CusterWhatcom Association of Celestial Observers
EverettEverett Astronomical Society
Friday HarborSirius Dippers 
Oak HarborIsland County Astronomical Society30
Port GambleOlympic Astronomical Society
RichlandTri-City Astronomy Club
SeattleBoeing Employees' Astronomical Society
SeattleSeattle Astronomical Society
SpokaneSpokane Astronomical Society
TacomaTacoma Astronomical Society
VancouverVancouver Sidewalk Astronomers
YakimaYakima Valley Astronomy Club
Maple ValleyMaple Valley Astronomical Society  
Maple valleyMaple Valley Astronomy  
PullmanWashington State University Astronomy Club  

West Virginia

ClarksburgCentral Appalachian Astronomy Club28
Cross LanesKanawha Valley Astronomical Society, Inc.
HuntingtonOhio Valley Astronomical Society
MorgantownAstronomy Club of West Virginia University 
WheelingASTROLABE Astronomy Club of Wheeling 
AthensThe Astronomy Club of Southern West Virginia  


AppletonNortheast Wisconsin Stargazers75
Fall CreekChippewa Valley Astronomical Society
FranklinWehr Astronomical Society
Green BayNeville Public Museum Astronomical Society
LaCrosseLaCrosse Area Astronomical Society50
MadisonMadison Astronomical Society
MilwaukeeTry Astronomy Milwaukee
New BerlinMilwaukee Astronomical Society
SheboyganSheboygan Astronomical Society30
Sturgeon BayDoor Peninsula Astronomical Society
Union GroveRacine Astronomical Society
HolmenHolmen Astronomy Club  


CasperCentral Wyoming Astronomical Society
CheyenneCheyenne Astronomical Society
LaramieLaramie Astronomical Soicety & Space Observers
GilletteCampbell County High School Astronomy Club  



ConstantineSirius Astronomy Association70





AhmedabadAstronomy Club Ahmedabad


Ulan BatorAmateur Astronomy Club of Mongolia  


BirgunjNepali Association for Astronomical Mission (NAAM)15

Viet Nam

HanoiVietnam Amateur Club of Astronomy (VACA)
Ho Chi Minh CityHo Chi Minh City Amateur Astronomy Club (HAAC)


Capital Territory

CanberraCanberra Astronomical Society

New South Wales

CoonabarabranAstronomical Society of Coonabarabran30
NewcastleNewcastle Astronomical Society, Inc.
SydneyAstronomical Society of New South Wales, Inc.
SydneyNorthern Sydney Astronomical Society
SydneyWestern Sydney Amateur Astronomy Group
Wollongong-Illawarra Astronomical Society, Inc.
WollongongThe Wollongong Amateur Astronomy Club

Northern Territory

Alice SpringsAstronomical Society of Alice Springs  
KaramaDarwin Amateur Astronomy Group 


BrisbaneAstronomical Association of Queensland100
BrisbaneSouth East Queensland Astronomical Society26
Bundaberg SouthBundaberg Astronomical Society, Inc.
Morningside-Brisbane Astronomical Society, Inc.
White RockCairns Astronomy Group
BundabergBundaberg Skywatchers  

South Australia

AdelaideAstronomical Society of South Australia, Inc.
BentleighAstronomical Society of Melbourne 
AdelaideFlinders University Astronomcial Society 


CambridgeAstronomical Society of Tasmania, Inc.


BendgoBendigo District Astronomical Society, Inc.
FrankstonMornington Peninsula Astronomical Society
MelbourneAstronomical Society of Victoria, Inc.
Mount PleasantBallaarat Astronomical Society, Inc.
Snake ValleySnake Valley Astronomical Association
Traralgon BCLatrobe Valley Astronomical Society, Inc.

Western Australia

PerthAstronomical Society of Western Australia



CalgaryRASC -- Calgary Centre
EdmontonRASC -- Edmonton Centre225
LethbridgeLethbridge Astronomy Society
VulcanBig Sky Astronomical Society
Drayton ValleyAncient Light Astronomy Club  
EdmontonEdmonton Observers Group Network  
EdmontonSpaceAlberta, affiliated with Edmonton Observers  

British Columbia

AbbotsfordFraser Valley Astronomers Society
KelownaRASC -- Okanagan Centre
Prince GeorgeRASC -- Prince George Center
VancouverRASC -- Vancouver
VictoriaRASC -- Victoria Centre200


WinnibegRASC -- Winnipeg Centre

New Brunswick

Riviere-VerteAstro Club Borealis
Saint JohnRASC -- New Brunswick
DieppeBeauséjour Astronomy Club Astronomie Beauséjour  
FrederictonRASC Moncton Centre, William Brydone Jack Unit  
HamptonHampton Astronomy Club  
ShippaganClub d'astronomie de la Péninsule acadienne  
Various in NBRASC Moncton Centre  


St. JohnsRASC -- St. John's Centre

Nova Scotia

HalifaxRASC -- Halifax Centre
WolfvilleMinas Astronomy Group26
Sydney RiverCape Breton Astronomical Society  


Deep RiverDeep River Astronomy Club 
HamiltonHamilton Amateur Astronomers80
KingstonRASC -- Kingston Centre
Kitchener/WaterlooRASC -- Kitchener-Waterloo Centre
LondonRASC -- London Centre120
LondonSt.Marys Astronomy Club12
MiltonRASC -- Hamilton Centre
MooretownRASC -- Sarnia Centre
Niagara FallsRASC -- Niagara Centre
North BayNorth Bay Astronomy Club
OshawaDurham Region Astronomical Association
OttawaOttawa Valley Astronomy and Observers Group
OttawaRASC -- Ottawa Centre
PeterboroughPeterborough Astronomical Association
RuthvenRASC -- Windsor Centre
SudburySudbury Astronomy Club30
Thunder BayRASC -- Thunder Bay Centre40
Thunder BayThunder Bay Observatory 
TorontoAstronomy and Space Exploration Society (U of T)1200
TorontoNorth York Astronomical Association
TorontoRASC -- Toronto Centre
YorkYork University Astronomy Club 
ManitoulinManitoulin Island Dark Sky Association  
Port ElginBruce County Astronomical Society  
Thunder BayThunder Bay Asronomy Group  

Prince Edward Island

CharlottetownRASC -- Charlottetown Centre


(QuébecRASC -- Québec Centre
BeloeilClub d'Astronomie de Beloeil
Cap-RougeClub d'astronomie VÉGA de Cap-Rouge
Centre-MauricieClub des Astronomes Amateurs Centre-Mauricie
DorvalClub d'Astronomie de Dorval50
DrummondvilleClub d'Astronomie Drummondville, Inc.
LavalClub des Astronomes Amateurs de Laval
LévisClub d'Astronomie du CEGEP Lévis-Lauzon
LongueuilClub des Astronomes Amateurs de Longueuil
MontréalGroupe Astro & CCD37
MontréalLa Société d'Astronomie de Montréal100
MontréalRASC -- Montréal Centre
Pierre-de-CoubertinFédération des Astronomes Amateurs du Québec
RimouskiClub d'Astronomie de l'U. du Québec a Rimouski
SaguenayClub d'Astronomie Sirius
SherbrookeClub des Astronomes Amateurs de Sherbrooke
SilleryClub d'astronomie Cassiopée de Sillery
Trois-Riviegrave;resClub d'Astronomie Jupiter, Inc.
ValleyfieldClub d'Astronomie Orion de Saint-Timothée


ReginaRASC -- Regina Centre
SaskatoonRASC -- Saskatoon Centre



CastriesSt.Lucia Royal Astronomy Club50


Czech Republic

PragueCzech Astronomical Society


NürnbergNürnberger Astronomische Arbeitsgeminschaft
TübingenInstitut für Astronomie und Astrophysik


LimerickShannonside Astronomy50
TullamoreTullamore Astronomical Society


MilanCircolo Astrofili Astrum Caeli17



San Luis PotosíSociedad Astronómica Julieta Fierro Gossman30



Royal Astronomical Society of New Zealand


AshburtonCanterbury Astronomical Society, Ashburton Branch
ChristchurchCanterbury Astronomical Society

South Auckland

AucklandAuckland Astronomical Society600


InvercargillSouthland Astronomical Society


New PlymouthNew Plymouth Astronomical Society


WellingtonPhoenix Astronomical Society
WellingtonWellington Astronomical Society



Telescope Group10



ValparaísoSociedad Astronómica de Valparaíso y Viña del Mar.


Western Province

ColomboIYA 2009 Sri Lanka55



AbingdonAbingdon Astronomical Society70
Barrow-in-FurnessFurness & South Lakeland Astronomical Society15
BatleyBatley & Spenborough Astronomical Society
BedfordBedford Astronomical Society
BingleyHebden Bridge Astronomy Society
BirminghamHeart of England Astronomical Society
BlackpoolBlackpool & District Astronomical Society
Bognor RegisSouth Downs Astronomical Society
BoltonBolton Astronomical Society
BracknellHerschel Astronomical Society
BradfordBradford Astronomical Society70
BridgwaterBridgwater Astronomical Society20
BrightonBrighton and Hove Astronomical Society
BristolBristol Astronomical Society
BurghfieldNewbury Amateur Astronomical Society
CambridgeCambridge Astronomical Association1000
ChathamMid-Kent Astronomical Society
ChesterfieldChesterfield Astronomical Society
ChichesterSouthern Area Group of Astronomical Societies
Clacton on SeaClacton & District Astronomical Association
ClevelandCleveland & Darlington Astronomical Society
CondoverShropshire Astronomical Society
CoventryCoventry & Warwickshire Astronomical Society
CrayfordCrayford Manor House Astronomical Society
CroydonCroydon Astronomical Society80
DerbyDerby & District Astronomical Society
Durham CityDurham University Astronomical Society
EastbourneEastbourne Astronomical Society
ElloughtonEast Riding Astronomers36
ExeterExeter Astronomical Society
FarnhamFarnham Astronomical Society
FolkestoneSouth East Kent Astronomical Society
GatleyAltrincham & District Astronomical Society
GiltbrookNottingham Astronomical Society
GuildfordGuildford Astronomical Society
HampshireHampshire Astronomical Group130
HooleChester Astronomical Society
HorshamHorsham Astronomy Group
HuddersfieldHuddersfield Astronomical & Philosophical Society
IpswichOrwell Astronomical Society
IpswichOrwell Astronomical Society (Ipswich)
LancasterLancaster & Morecambe Astronomical Society
LeedsLeeds Astronomical Society40
LeicesterLeicester University Astronomical Society
LetchworthLetchworth & District Astronomical Society
LincolnLincoln Astronomical Society45
LiverpoolLiverpool Astronomical Society
LondonBritish Astronomical Association
LondonSociety for Popular Astronomy
MaidenheadMaidenhead Astronomical Society
ManchesterManchester Astronomical Society
MexboroughMexborough & Swinton Astronomical Society
Milton KeynesMilton Keynes Astronomical Society30
Newcastle-Under-LymeNorth Staffordshire Astronomical Society
North CornellyFederation of Astronomical Societies
North DevonNorth Devon Astronomical Society
North West LondonSouth West Herts Astronomical Society
NorthamptonNorthamptonshire Natural History Society, Astronom
NorwichBreckland Astronomical Society
NorwichNorwich Astronomical Society140
NottinghamIlkeston & District Astronomical Society
NottinghamshireMansfield & Sutton Astronomical Society
OrpingtonOrpington Astronomical Society
PeterboroughPeterborough Astronomical Society
PlymouthPlymouth Astronomical Society40
PontefractWest Yorkshire Astronomical Society
RayleighCastle Point Astronomical Club
SaleMacclesfield Astronomical Society
ShinfieldReading Astronomical Society
ShirleySouthampton Astronomical Society
SpaldingSouth Lincolnshire Astronomical & Geophysical Soci40
SunderlandSunderland Astronomical Society
SuttonBirmingham Astronomical Society
ThameAylesbury Astronomical Society
Theydon BoisLoughton Astronomical Society
WellingboroughNorthants Amateur Astronomers
West EwellEwell Astronomical Society
WhittingtonWelsh Border Astronomers
WithamNorth Essex Astronomical Society
WorcesterWorcester Astronomical Society
WorthingWorthing Astronomers80 +
Wrea GreenPreston & District Astronomical Society
WycombeWycombe Astronomical Society
YorkYork Astronomical Society

Island of Guernsey

St Peter PortGuernsey Astronomy Society60

Isle of Man

PeelIsle of Man Astronomical Society


AberdeenAberdeen & District Astronomical Society
DundeeDundee Astronomical Society
DunfermlineDunfermline Astronomical Society70
EdinburghAstronomical Society of Edinburgh
GlasgowAstronomical Society of Glasgow
InvernessHighland Astronomical Society76


CardiffCardiff Astronomical Society250
GowertonSwansea Astronomical Society
LlanrugGwynedd Astronomical Society
LlanrugNorthwest Group of Astronomical Societies


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