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Column legend:| City | Website ( = Contact page :  = Postal address) | Members |
| American Assn. of Variable Star Observers |
| American Association of Amateur Astronomers |
| American Lunar Society |  |  |
| American Meteor Society, Ltd. |
| Antique Telescope Society |
| Association of Lunar and Planetary Observers |
| Astronomical League |
| Astronomical Society of the Pacific |
| ASTRONOMO.org Foro Astronomía Observacional | 100 |
| Astronomy Day Headquarters |
| International Association for Astronomical Studies |
| International Astronomical Union |
| International Dark-Sky Association | 11000 |
| International Meteor Organization | 250 |
| International Occultation Timing Association | |
| Night Skies Network | 9681 |
| North American Meteor Network |  |
| Oregon Star Party |
| RTMC Astronomy Expo |
| Society of Amateur Radio Astronomers |
| Stellafane |
| Texas Star Party |
| The Royal Astronomical Society of Canada (RASC) |
| The SETI League, Inc. |
| The Sidewalk Astronomers |  |
| Visual Satellite Observers |
| Western Amateur Astronomers |
| Auburn | Auburn Astronomical Society | 20 | | |
| Florence | Shoals Astronomy Club | 20 | | |
| Gadsden | N.E.R.D.S. | 10 | |
| Hueytown | Birmingham Astronomical Society | 80 | | |
| Huntsville | Von Braun Astronomical Society | 100 | | | |
| Florence | UNA Astronomy Club | → |
| Mobile | Mobile Astronomical Society |  |
| Tuscaloosa | The Astronomical Society of Tuscaloosa |
| Yahoo Group | Alaskan Astronomy Group |
| Anchorage | Chugach Stargazer Society |
| Fairbanks | Fairbanks Astronomical Unit |
| Anthem | Desert Foothills Astronomy Club |
| Clarkdale | Astronomers of Verde Valley | 70 | |
| Flagstaff | Coconino Astronomical Society | 20 | | | |
| Green Valley | Sonora Astronomical Society (SAS) | 180+ | |
| Heber-Overgaard | Heber-Overgaard Astronomy Club | 30 | | |
| Kingman | High Desert Astronomy Club | |
| Lake Havasu City | Lake Havasu Astronomy Club | |
| Oro Valley | Sun City Astronomy Club | 170 | | |
| Payson | Rim Astronomy club |
| Phoenix | East Valley Astronomy Club | 235 | | |
| Phoenix | Phoenix Astronomical Society | 100 | | |
| Phoenix | Saguaro Astronomy Club | 100+ | | |
| Prescott | Prescott Astronomy Club | 65 | | |
| Sedona | Sirius Lookers of Sedona | 80 | |
| Sierra Vista | Huachuca Astronomy Club | 50 | | |
| Sun City West | Astronomy Club of Sun City West | → |
| Surprise | West Valley Astronomy Club | |
| Tucson | Tucson Amateur Astronomy Assn. | 290 | | |
| Tucson | University of Arizona Astronomy Club | 20 | |
| Verrado | Astronomy Club AZ |
| Verrado | Astronomy Club of Verrado | → |
| Yuma | Yuma Astronomy Club | 172 | | |
| Eagar | White Mountains Astronomy Club |
| Grand Canyon | Astronomical Society of the Grand Canyon |
| Pima | Desert Skygazer Astronomy Club |
| Bella Vista | Ozark Stargazers | |
| Bella Vista | Sugar Creek Astronomical Society | |
| Little Rock | Central Arkansas Astronomical Society | 40 | |
| Nashville | Red River Astronomy CLub | | |
| Russellville | River Valley Stargazers | 20 |
| Van Buren | Arkansas-Oklahoma Astronomical Society | 41 | |
| Fayetteville | Astronomical Society of Northwest Arkansas |
| Hot Springs Village | Hot Springs Village Star Gazers |
| Siloam Springs | Christian Association of Stellar Explorers |
| State University | Northeast Arkansas Sky Crew |
| Apple Valley | High Desert Astronomical Society | 50 | | |
| Bakersfield | Kern Astronomical Society, Inc. | 60 | |
| Berkeley | Astronomical Association of Northern California | |
| Big Bear Lake | Big Bear Valley Astronomical Society | | | |
| Claremont | Pomona Valley Amateur Astronomers | 112 | | |
| Concord | Mount Diablo Astronomical Society | 170 | | |
| Costa Mesa | Orange County Astronomers | 850+ | | | |
| Davis | Astronomy Club of the U C Davis | | |
| Davis | Davis Astronomy Club | | | |
| Eureka | Astronomers of Humboldt | 25 | | |
| Fresno | Central Valley Astronomers, Inc. | 60 | |
| Hercules | Hercules Stargazers | 20 | |
| Joshua Tree | Southern California Desert Video Astronomers | | | |
| Kernville | Kern River Valley Astronomy Club | |
| Lake Arrowhead | Mountain Skies Astronomical Society | 310 | | |
| Livermore | Tri-Valley Stargazers | 190 | | |
| Los Angeles | Los Angeles Astronomical Society | 600+ | | |
| Marina | Astronomical Society of the Central Coast | → |
| Marina | MIRA Observers Group | |
| Monrovia | Old Town Sidewalk Astronomers |
| Mountain View | Peninsula Astronomical Society | 250 | | |
| Mt. Shasta | Mt Shasta Star Gazers | |
| Oakland | Eastbay Astronomical Society | 200 | | |
| Palm Desert | Astronomical Society of the Desert | |
| Palmdale | Antelope Valley Astronomy Club, Inc | 100 | | |
| Rancho California | Temecula Valley Astronomers | | | |
| Redding | Shasta Astronomy Club | |
| Riverside | Riverside Astronomical Society | 285 | | |
| Sacramento | Sacramento Valley Astronomical Society | |
| San Bernardino | San Bernardino Valley Amateur Astronomers | | |
| San Diego | San Diego Astronomy Association | 600 | | |
| San Diego | Schwartz Astronomical Society | 3 | |
| San Francisco | San Francisco Amateur Astronomers | 350 | | |
| San Jose | Halls Valley Astronomical Group | 25 | |
| San Jose | San Jose Astronomical Association | | |
| San Juan Bautista | Fremont Peak Observatory Association | 175 | | |
| San Leandro | Group 70 -- Large Amateur Telescope Project |
| San Luis Obispo | Central Coast Astronomical Society | 90 | | |
| San Mateo | San Mateo County Astronomical Society | 110 | | |  |
| Santa Barbara | Santa Barbara Astronomical Unit | 90 | | |
| Santa Clarita | Local Group Astronomy Club | | |
| Santa Cruz | Santa Cruz Astronomy Club | 40 | |
| Santa Monica | Santa Monica Amateur Astronomy Club | |
| Santa Rosa | Sonoma County Astronomical Society | 150 | | |
| Simi Valley | Ventura County Astronomical Society | | |
| Stockton | Stockton Astronomical Society | 140 | |
| Tehachapi | Greater Tehachapi Astronomy Club | 28 | |
| Temecula | Stony Ridge Observatory, Inc. | 25 | |
| Torrance | South Bay Astronomical Society | 75 | | |
| Van Nuys | Los Angeles Valley College Astronomy Group | 25 | |
| Vandenberg AFB | Vandenberg Amateur Astronomical Society | 35 | |
| Visalia | Tulare Astronomical Association | 120 | | | |
| Walnut creek | Mount Diablo Observatory Association | → |
| Yucca Valley | The Andromeda Society | 70 | | |
| Aptos | Cabrillo Astronomy Club | - |
| Arcata | Arcata Society for Amateur Astronomers |
| Bishop | White Mountain Astronomers |
| Blythe | Colorado River Astronomy Club |
| Brea | Golfing Astronomer Musician's Association |
| Chatsworth | Celestial Observers |
| Cypress | Western Observatory Astronomy Society |
| Glen Ellen | Valley of the Moon Astronomical Society |
| Idyllwild | Idyll-Gazers Amateur Astronomy Club | |
| Lakewood | Excelsior Telescope Club |
| Lockwood Valley | One club that requests to be unlisted |
| Long Beach | Long Beach Astronomical Socity | |
| Los Angeles | Clear Nights |
| Los Angeles | The Astronomy Forum |
| Los Gatos | The Astronomy Connection |  | |
| Manteca | Manteca Observer's Group |
| Merced | M-STAR Astronomy Club |
| Merced | Merced Society for Telescope & Astronomy Rec |
| Mill Valley | Marin Stargazers |
| Modesto | Great Valley Astronomy Club | |
| Modesto | Stanislaus Amateur Astronomers | |
| Moorpark | One club that requests to be unlisted |
| Oceanside (San Diego) | Oceanside Photo & Telescope Astronomical Society |
| Palm Desert | Sun City Palm Desert Astronomy Club |
| Pasadena | Caltech SEDS |
| Pasadena | Mount Wilson Observatory Assn. |
| Ridgecrest | China Lake Astronomical Society |
| Sacramento | Sidewalk Astronomers of Sacramento |
| San Anselmo | Tamalpais Astronomical Society |
| San Diego | Not When the Surf's Up Amateur Astronomers Group | |
| San Francisco | San Francisco Sidewalk Astronomers |
| San Francisco | Students Taking Astronomy-Related Subjects |
| San Mateo | CCFF Astronomy Club |
| Sherman Oaks | Sherman Oaks Astronomers Group |
| Simi Valley | Southern California Observers |
| Somis | Polaris Observatory Association Inc. |
| South Lake Tahoe | Lake Tahoe Astronomers |
| Springville | Tule River Amateur Astronomers |
| Temecula | FirstLight Astronomy Club | |
| Ukiah | Ukiah Astronomical Society |
| Whittier | Rio Hondo Astronomical Society |
| Boulder | Boulder Astronomy & Space Society | | |
| Buena Vista | Arkansas Valley Astronomical Society |
| Colorado Springs | Colorado Springs Astronomical Society | 90 | |  |
| Denver | Denver Astronomical Society | | | |
| Durango | Four Corners Stargazers | |
| Fort Collins | Northern Colorado Astronomical Society | 60 | |
| Grand Junction | Western Colorado Astronomy Club | 24 | | |
| Longmont | Longmont Astronomical Society | 40 | | |
| Montrose | Black Canyon Astronomical Society | |
| Pueblo | Southern Colorado Astronomical Society | 30 | | |
| Clifton | Colorado Astronomy & Space Research Organization |
| Elbert | High Plains Astronomy Club |
| Glenwood Springs | Three Rivers Astronomy Club |
| Grand Junction | Palisade Astronomy Connection |
| Gunnison | Gunnison Valley Astronomical Society |
| Pueblo | Rocky Mountain Astronomy Club | |
| San Anselmo | Tamalpais Astronomical Society |
| Steamboat Springs | Yampa Valley Astronomy Club |
| Greenwich | Astronomical Society of Greenwich | |
| Hartford | Astronomical Society of Greater Hartford | 105 | | | |
| New Haven | Astronomical Society of New Haven, Inc. | | |
| Noank | Thames Amateur Astronomical Society | 30 | |
| Stratford | Boothe Memorial Astronomical Society | 20 | |
| Torrington | Litchfield Hills Amateur Astronomy Club | |
| Westport | Westport Astronomical Society | 120 | | |
| Stamford | Fairfield County Astronomical Society |
| Waterbury | Mattatuck Astronomical Society |
| Wilmington | Delaware Astronomical Society |
| Smyrna | Delmarva Star Gazers | |
| College Park, MD | National Capital Astronomers | 250 |
| Bradenton | Local Group of Deep Sky Observers | 100 | | |
| Cocoa | Brevard Astronomical Society | 40 |
| Fort Lauderdale | South Florida Amateur Astronomers Assn. | 70 |
| Fort Myers | South West Florida Astronomical Society |
| Fort Pierce | Treasure Coast Astronomical Society | 45 |
| Gainesville | Alachua Astronomy Club, Inc. | 110 | | |
| Jacksonville | Northeast Florida Astronomical Society, Inc. | 70 |
| Lady Lake | The Villages Astronomy Club |
| Melbourne | FIT Astronomy Society | 40 | |
| Miami | Belen Jesuit Prep School Astronomy Club |
| Miami | Southern Cross Astronomical Society | 200 | |
| Naples | Everglades Astronomical Society | 40 |
| Panama City | Astronomical Society of Bay County | 12 |
| Pensacola | Escambia Amateur Astronomers Assn. | 150 | |
| St. Augustine | Ancient City Astronomy Club | 40 |
| St. Petersburg | St. Petersburg Astronomy Club, Inc. | 270 | | | |
| Tallahassee | Tallahassee Astronomical Society | 40 |
| Tampa | MARS Astronomy Club | 25 | |
| Titusville | Kennedy Space Center Amateur Astronomers | 30 |
| West Palm Beach | Astronomical Society of the Palm Beaches | 100 | | |
| Winter Park | Central Florida Astronomical Society |
| Crystal River | Crystal River High School Astronomy Club |
| Englewood | Lemon Bay High School Astronomy Club |
| Ocala | Greater Ocala Astronomy Club |
| Pine Hills | Cosmo Astronomical Society |
| Sebring | Highlands Stargazers |
| Seminole | Astro Scopers |
| Vero Beach | Indian River Astronomical Society |
| Winter Haven | Winter Haven Astronomy Club |
| Atlanta/Marietta | Atlanta Astronomy Club, Inc. | 270 | |
| Augusta | Astronomy Club of Augusta | 60 |
| Gainesville | North Georgia Astronomy Club | 60 |
| Griffin | Flint River Astronomy Club | 40 |
| Macon | Middle Georgia Astronomical Society | 30 |
| Savannah | Oglethorpe Astronomical Assn. | 40 | |
| Sharon | Deerlick Astronomy Village |
| Statesboro | Statesboro Astronomy Club | 50 |
| Athens | Athens Astronomical Association |
| Columbus | Chattahoochee Valley Astronomical Society |
| Macon | Macon State College Astronomy Club |
| Statesboro | Galloway Amateur Astronomy Club |
| Tifton | Southern Georgia Astronomers - SGA |
| Honolulu | Hawaiian Astronomical Society |
| Maui | Maui Astronomy Club | 10 |
| Waimea | Kauai Educational Assn. for Science & Astronomy |
| Ocean View | Meteor Group Hawaii |
| Boise | Boise Astronomical Society | 75 | | |
| Idaho Falls | Idaho Falls Astronomical Society | 40 | | |
| Jerome | Magic Valley Astronomical Society | 20 | |
| Algonquin | Planetary Studies Foundation |
| Batavia | Fox Valley Astronomical Society | 15 |
| Carbondale | Astronomical Association of Southern Illinois | 30 |
| Champaign | Champaign-Urbana Astronomical Society | 75 |
| Chicago | Chicago Astronomer | 370 | |
| Chicago | Chicago Astronomical Society | 110 | |
| Chicago | Ryerson Astronomical Society | 15 |
| Deerfield | Skokie Valley Astronomers | 45 |
| Kankakee | Kankakee Area Stargazers | 45 | |
| Naperville | Naperville Astronomical Assn. | 120 | |
| Normal | Twin City Amateur Astronomers, Inc. | 50 | |
| Peoria | Peoria Astronomical Society, Inc. | 125 | | | |
| Rock Island | Popular Astronomy Club, Inc. | 75 | |
| Rockford | Rockford Amateur Astronomers Inc. | 52 | |
| Schaumburg | Northwest Suburban Astronomers | 100 | |
| Springfield | Sangamon Astronomical Society | 25 |
| St. Jacob | River Bend Astronomy Club | → |
| Urbana | Astronomical Society at Univ. of Illinois | 100 | |
| Volo | Lake County Astronomical Society | 100 | | | |
| Decatur | Decatur Area Astronomy Club |
| DeKalb | Northern Illinois University Astronomical Society |
| Dixon | Northern Illinois Stargazers |
| Bedford | Stonebelt Stargazers | |
| Columbus | Columbus Astronomy Club | |
| Evansville | Evansville Astronomical Society, Inc. | |
| Farmland | Muncie Astronomy Club | 35 | |
| Fort Wayne | Fort Wayne Astronomical Society, Inc. | 102 | | |
| Griffith | Calumet Astronomical Society | 75 | |
| Mooresville | Indiana Astronomical Society, Inc. | 150 | | |
| South Bend | Michiana Astronomical Society | 20 | |
| West Lafayette | Wabash Valley Astronomical Society | 35 | |
| Winona Lake | Warsaw Astronomical Society | 30 | |
| Fremont | Astronomical Society of Hillsdale County |
| Kokomo | Kokomo Astronomy Club |
| Terre Haute | Rose-Hulman Astronomical Society |
| Wabash | Wabash County Astronomical Society |
| Ames | Ames Area Amateur Astronomers | 80 | | | |
| Cedar Rapids | Cedar Amateur Astronomers, Inc. | 100 | | | |
| Davenport | Quad Cities Astronomy Club | | | |
| Des Moines | Des Moines Astronomical Society, Inc. | 40 | | |
| Indianola | Central Iowa Astronomers | 4 | |
| Iowa City | Iowa City Astronomy Club | 20 | |
| Tama | Amateur Astronomers of Central Iowa | |
| Cherokee | Northwest Iowa Astronomers |
| Des Moines | Des Moines Astronomy Club |
| Waterloo | Cedar Valley Amateur Astronomers Association |
| West Burlington | Southeast Iowa Astronomy Club |
| Lawrence | Astronomy Associates of Lawrence | 20 |
| Salina | Salina Astronomy Club | 20 | |
| Topeka | Northeast Kansas Amateur Astronomers' League, Inc. | 40 |
| Wichita | Kansas Astronomical Observers | 30 | |
| Dodge City | High Plains Astronomical Society |
| Manhattan | North Central Kansas Astronomical Society |
| Topeka | Heartland Astronomical Research Team |
| Dawson Springs | Western Kentucky Amateur Astronomers | |
| Lexington | Blue Grass Amateur Astronomy Club | |
| Louisville | Louisville Astronomical Society | 100 | |
| Pine Knot | Big South Fork Star Gazers | |
| Staffordsville | Eastern Kentucky Astronomy Connection |
| Huntington | Ohio Valley Astronomical Society |
| Baton Rouge | Baton Rouge Astronomical Society, Inc. | |
| New Orleans | Pontchartrain Astronomy Society, Inc. | 160 | | |
| Shreveport | Shreveport-Bossier Astronomical Society, Inc. | 60 | | |
| Bangor | Penobscot Valley Star Gazers |
| Boothbay | Central Maine Astronomical Society | 30 |
| Kennebunkport | Astronomical Society of Northern New England | 140 | |
| Pembroke | Downeast Amateur Astronomy Club |
| Baltimore | Baltimore Astronomical Society | 140 |
| Bel Air | Harford County Astronomical Society | 60 |
| Centreville | Northern Virginia Astronomy Club | 600+ |
| Columbia | Howard Astronomical League | 50 |
| Frostburg | Cumberland Astronomy Club | |
| Greenbelt | Astronomical Society of Greenbeld | |
| Greenbelt | Goddard Astronomy Club | 40 |
| Hagerstown | Tri-State Astronomers | 25 |
| Sykesville | Westminster Astronomical Society |
| White Plains | Southern Maryland Astronomical Society |
| Arnold | Anne Arundel Assn. of Amateur Astronomers |
| Silver Spring | The Patient Astronomer |
| Amherst | Amherst Astronomy Assn. | 70 |
| Boston | Boston University Astronomical Society | 60 | |
| Boston & Westford | Amateur Telescope Makers of Boston, Inc. | 350 |
| Brewster | Cape Cod Astronomical Society | 65 |
| Edgartown | Martha's Vineyard Astronomy Club | 16 |
| Gloucester | Gloucester Area Astronomy Club | 30 |
| Groveland | North Shore Amateur Astronomy Club | 117 | | |
| Norwell | South Shore Astronomical Society | 50 |
| Paxton | Aldrich Astronomical Society | 50 |
| Rehoboth | Astronomical Society of Southern New England | 100 |
| Springfield | Springfield Stars Club | 75 |
| Adams | Northern Berkshire Amateur Astronomy Club |
| Kingston | Silver Lake Regional High School Astronomy Club |
| Pittsfield | Pittsfield Astronomy Club |
| Plymouth | Bay Colony Astronomical Society |
| Saugus | Double Star Observer |
| Ann Arbor | University Lowbrow Astronomers | 100 | | | |
| Ann Arbor | University of Michigan Student Astronomical Societ |
| Dearborn | Ford Amateur Astronomy Club | 153 | | |
| East Lansing | Capital Area Astronomy Club | 60 | |
| Grand Rapids | Grand Rapids Amateur Astronomical Association. | 200 |
| Holland | Shoreline Amateur Astronomical Association | 20 |
| Jackson | Amateur Astronomers of Jackson | 28 |
| Kalamazoo | Kalamazoo Astronomical Society | 175 |
| Midland | Sunset Astronomical Society | 50 | |
| Milford | General Motors Astronomy Club | | | |
| Muskegon | Muskegon Astronomical Society |
| Rochester Hills | Oakland Astronomy Club | 25 |
| Rockwood | Sirius Stargazers | 40 |
| Traverse City | Grand Traverse Astronomical Society | 50 |
| Warren | Warren Astronomical Society | 112 | |
| Ypsilanti | Eastern Michigan Univ. Astronomy Club |
| Clarkston | Detroit Astronomical Society |  |
| Escanaba | Delta Astronomical Society |
| Flint | Genesee Astronomical Society | |
| Gaylord | North Star Astronomical Society (NSAS) |
| Manitou Beach | Astronomical Society of Lenawee & Hillsdale |
| Marquette | Marquette Astronomical Society |  |
| Midland | Seven Ponds Astronomy Club |
| Rochester | Dinosaur Hill Astro. Society |
| Duluth | Arrowhead Astronomical Society, Duluth MN | 20 |
| Minneapolis and St. Paul | Minnesota Astronomical Society | 400 | |
| Moorhead | Fargo-Moorhead Astronomical Club | 15 |
| French Camp | Rainwater Astronomers Assn. | 30 |
| Jackson | Jackson Astronomical Association | 40 |
| Greenville | Galileo Group |
| Blue Springs | Astronomical Society of Kansas City | |
| Columbia | Central Missouri Astronomical Association |
| Springfield | Ozarks Amateur Astronomers Club | 30 | | | |
| Springfield | Springfield Astronomical Society |
| St. Louis | River Bend Astronomy Club | 30 | |
| St. Louis | St. Louis Astronomical Society, Inc. | 250 |
| Washington | Eastern Missouri Dark Sky Observers |
| Blue Springs | Kansas Astronomy Village |
| Florissant | McDonnell-Douglas Amateur Astronomers | |
| Lamar | Stilabower Public Observatory | |
| St. Louis | Boeing Employees Amateur Astronomers Club | |
| Troy | Lincoln County Stargazers |
| Billings | Yellowstone Valley Amateur Astronomers | 40 |
| Bozeman | Southwest Montana Astronomical Society | 55 |
| Kalispell | Big Sky Astronomy Club | 25 | |
| Missoula | Western Montana Astronomical Association | 20 | |
| Ulm | Centralmo Astronomy Society | 35 | |
| Helena | Astronomical Institute of the Rockies |
| Helena | Neuman Astronomical Society |
| Ravalli | Mission Valley Astronomy Club |
| Lincoln | Prairie Astronomy Club | 100 |
| Omaha | Omaha Astronomical Society | 90 |
| Scottsbluff | Panhandle Astronomy Club |
| Norfolk | Northeast Nebraska Astronomy Club |
| Henderson | Astronomical Society of Nevada, Las Vegas |
| Las Vegas | Las Vegas Astronomical Society |
| Reno, Tonopah, Las Vegas, Reno, Sparks | Astronomical Society of Nevada |
| Tonopah | Tonopah Astronomical Society | |
| Alstead | Keene Amateur Astronomers, Inc. | 25 |
| Manchester | New Hampshire Astronomical Society | 150 | |
| Boonton | Sheep Hill Astronomical Association |
| Clifton | North Jersey Astronomical Group | 50 |
| Closter | Rockland Astronomy Club |
| Cranford | Amateur Astronomers, Inc. | 221 |
| East Hanover | Skyland Stargazers | 15 |
| Gloucester | Willingboro Astronomical Society | → |
| Gloucester City | West Jersey Astronomical Society |
| High Bridge | New Jersey Astronomical Assn., Inc. |
| Little Ferry | SETI League, Inc. | 1467 |
| Morristown | Morris Museum Astronomical Society | 25 |
| Piscataway | Rutgers Astronomical Society |
| Princeton | Amateur Astronomers Association of Princeton |
| Red Bank | STAR Astronomy Society, Inc. | 60 |
| Toms River | ASTRA -Astronomical Society of the Toms River Area | 75 |
| Upper Township | South Jersey Astronomy Club | 110 |
| Warren | United Astronomy Clubs of New Jersey, Inc. |
| Bridgewater | Somerset County 4-H Space & Astronomy Club |
| Howell | Monmouth Mobile Observer's Group | |
| Jamesburg | Concordia Astronomy Club |
| Newton | Dark Sky Observers |
| Newton | Montclair Telescope Club, Inc. |
| Paterson | The Passaic County Astronomical Association |
| Alamogordo | Amateur Astronomers Group | |
| Albuquerque | The Albuquerque Astronomical Society | 420 | |
| Las Cruces | Astronomical Society of Las Cruces | 100 |
| Los Alamos | Pajarito Astronomers |
| Magdalena | Magdalena Astronomical Society | 20 | |
| Ranchvale | Clovis Astronomy Club | |
| Rio Rancho | Rio Rancho Astronomical Society |
| Roswell | Roswell Astronomy Club |
| Silver City | Silver City Astronomical Society |
| Socorro | New Mexico Tech Astronomy Club |
| Taos | El Valle Astronomers |
| Alamogordo | Alamogordo Astronomy Club |
| Corrales | Rio Grande Astronomical Society (RGAS) | |
| Buffalo | Buffalo Astronomical Association | 150 |
| Chappaqua | Westchester Amateur Astronomers |
| Clinton | Mohawk Valley Astronomical Society |
| Jamestown | Marshal Martz Memorial Astronomical Assn., Inc. |
| Massapequa | Astronomical Society of Long Island, Inc. |
| Merrick, Long Island | Amateur Observer's Society of New York, Inc. |
| New Paltz | Mid-Hudson Astronomy Assn. | 75 |
| New York | Amateur Astronomers Association of New York | 150 | |
| Niskayuna | Albany Area Amateur Astronomers, Inc. | 140+ |
| Rochester | Rochester's Astronomy Club | 350 | |
| Southold | Custer Institute Observatory |
| Syracuse | Syracuse Astronomical Society | 60 |
| Troy | Rensselaer Astrophysical Society | 25 |
| Vestal | Kopernik Astronomical Society | |
| Ithaca | Ithaca Amateur Astronomers |
| Orange County | Orange County Astronomical Association | |
| Asheville | Astronomy Club of Asheville | 45 |
| Boiling Springs | Cleveland County Astronomical Society |
| Chapel Hill | Chapel Hill Astronomical and Observational Soc. | |
| Charlotte | Charlotte Amateur Astronomers Club |
| Columbus | Foothills Astronomical Society |
| Greensboro | Greensboro Astronomy Club |
| Hickory | Catawba Valley Astronomy Club | 45 |
| Raleigh | Raleigh Astronomy Club, Inc. | 80 |
| Rosman | Pisgah Astronomical Research Institute |
| Salisbury | Astronomical Society of Rowan County | |
| Troutman | Piedmont Amateur Astronomers |
| Wilmington | Cape Fear Astronomical Society |
| Wilson | Tar River Astronomy Club | |
| Winston-Salem | Forsyth Astronomical Society |
| Archdale/High Point | Triad Action Astronomy Club |
| Asheville | Starfax Association |
| Winston-Salem | Logos Astronomical Society |
| Grand Forks | Northern Skies Astronomical Society |
| Akron | Astronomy Club of Akron, Inc. |
| Bellaire | Northern Ohio Valley Astronomical Educators | |
| Chagrin Falls | Chagrin Valley Astronomical Society | 40 |
| Columbus | Columbus Astronomical Society |
| Dayton | Miami Valley Astronomical Society | 110 | |
| Findlay | Millstream Astronomy Club |
| Huntington | Ohio Valley Astronomical Society |
| Lima | Lima Astronomical Society | 32 |
| Lucas | Astronomy For Youth | 12 |
| Mansfield | Richland Astronomical Society |
| Mansfield | Sandusky Valley Amateur Astronomy Club | |
| Newton Falls | Mahoning Valley Astronomical Society |
| North Olmstead | Cuyahoga Astronomical Association |
| Oberlin | Black River Astronomical Society | 35 | | | |
| Troy | Stillwater Stargazers |
| Wilmot | Wilderness Center Astronomy Club |
| Wooster | Wayne County Astronomical Society | 25 |
| Brunswick | Brunswick Astronomy Club |
| Lakewood | Ohio Turnpike Astronomers Assn. |
| Medina | Medina County Astronomical Society |
| Oklahoma City | Oklahoma City Astronomy Club |
| Stillwater | Tuva Astronomy Club |
| Tulsa | Astronomy Club of Tulsa |
| Wanette | Odyssey Astronomy Club |
| Ashland | Southern Oregon Skywatchers |
| Bend | Pine Mountain Observatory | |
| Eugene | Eugene Astronomical Society |
| Grants Pass | Grants Pass Astronomers | 15 |
| Portland | Rose City Astronomers |
| Roseburg | Umpqua Astronomers |
| Boring | Mt. Hood Observatory Assn. |
| Salem | Night Sky 45 Astronomy Club |
| Vernonia | Northwest Astronomy Group |
| Allentown | Lehigh Valley Amateur Astronomical Society, Inc. |
| altoona | Starlight Astronomy Club |
| Avondale | Chester County Astronomical Society |
| Chalfont | Bucks-Mont Astronomical Assn. |
| Clarks Summit | Lackawanna Astronomical Society | 100 | |
| Conyngham | Greater Hazleton Area Astronomical Society | 30 | |
| Franklin/Oil City | Oil Region Astronomical Society | 30 | |
| Harrisburg | Astronomical Society of Harrisburg | |
| Lancaster | Astronomy Enthusiasts of Lancaster County | | |
| Limerick | Chesmont Astronomical Society |
| Norristown | Delaware Valley Amateur Astronomers | |
| Philadelphia | Rittenhouse Astronomical Society | 70 | | |
| Pittsburgh | Amateur Astronomers Assn. of Pittsburgh, Inc. | 550 | |
| Villanova | Villanova Astronomical Society | |
| Western Pennsylvania | Amateur Astronomers of Beaver County | |
| Wyomissing | Berks County Amateur Astronomical Society, Inc. |
| York | York County Astronomical Society | |
| Erie | Erie County Mobile Observers Group |
| Harleysville | 90mm | |
| Kane | Sir Isaac Newton Astronomical Society |
| Lewisburg | Susquehanna Valley Amateur Astronomers | |
| Saltsburg | The Kiski School Astronomy Club |
| State College | Central Pennsylvania Observers |
| University Park | Penn State Astronomy Club | - |
| North Scituate | Skyscrapers, Inc. | |
| Rehoboth | Astronomical Society of Southern New England | |
| Providence | Celestial Observers of Rhode Island | |
| Charleston | LowCountry Stargazers | 17 | |
| Columbia | Midlands Astronomy Club | 80 | | |
| Greenville | Roper Mountain Astronomers | |
| Seneca | Clemson Area Amateur Astronomers | | |
| Beaufort | Beaufort South Carolina Astronomer |
| Columbia | Midlands Technical College Astronomy Club | |
| Columbus | Foothills Astronomical Society |
| Myrtle Beach | Grand Strand Skygazers |
| Rock Hill | Carolina Skygazers Astronomy Club |
| Seneca | Upstate Astrophotography | |
| Rapid City | Black Hills Astronomical Society | | |
| Sioux Falls | Sioux Empire Astronomy Club |
| Brentwood | Barnard-Seyfert Astronomical Society | |
| Chattanooga | Barnard Astronomical Society | |
| Gallatin | Cumberland Astronomical Society | 35 | |
| Knoxville | Knoxville Observers | |
| Knoxville | Smoky Mountain Astronomical Society | |
| Memphis | Memphis Astronomical Society | |
| Bristol | Bristol Astronomy Club | |
| Kingsport | Bays Mountain Astronomy Club |
| Manchester | Middle Tennessee Astronomical Society |
| Alpine | Big Bend Astronomical Society | → |
| Alpine | Big Bend Astronomy | |
| Amarillo | Amarillo Astronomy Club | 45 |
| Arlington | Olympus Mons |
| Austin | Austin Astronomical Society | 200 | |
| Dallas | Texas Astronomical Society | 520 | | |
| Flint | Astronomical Society of East Texas | | |
| Fort Worth | Fort Worth Astronomical Society, Inc. | 150 | | |
| Georgetown | Williamson County Astronomy Club |
| Houston | Fort Bend Astronomy Club | 124 | | | |
| Houston | Houston Astronomical Society | 250 | | |
| Houston | Johnson Space Center Astronomical Society |
| Kingwood | North Houston Astronomy Club | 160 | | |
| Leander | Astronomy Students Association - UT/Austin |
| Lipan | Lipan Astronomy & Space Society |
| Lubbock | South Plains Astronomy Club | |
| Midland | West Texas Astronomers | | |
| North Richland Hills | Whitney Astronomy | |
| San Angelo | San Angelo Amateur Astronomy Assn. | 57 | | |
| San Antonio | San Antonio Astronomical Association | 240 | | |
| Victoria | Crossroads Astronomy Club | |
| Waco | Central Texas Astronomical Society | 130 | | | |
| Azle | North Texas Skywatch |
| Brownsville | South Texas Astronomical Society |
| College Station | Assn. of Amateur Astronomers |
| El Paso | El Paso Astronomy Club |
| Fort Worth | General Dynamics Astronomy Club |
| Kingsville | Kingsville Astronomical Society |
| Larado | Star Astronomy Club |
| Lubbock | South Plains Astronomy Club |
| San Antonio | San Antonio Astronomical Observers Group |
| Sherman | Astronomical Society of North Texas |
| Wichita Falls | Starlight Observers League - SOL |
| Lindon | Utah Valley Astronomy Association | → |
| Logan | Cache Valley Astronomical Society | |
| Ogden | Ogden Astronomical Society | 55 | | | |
| Pleasant Grove | Utah Valley Astronomy Club | 100 | | |
| Price | Carbon County Star Parties | 230 | |
| Provo | Brigham Young University Astronomical Society | |
| Salt Lake City | Salt Lake Astronomical Society | 160 | | |
| St. George | St. George Astronomy Group | 50 | |
| Park City | Utah Skies |
| Springfield | Springfield Telescope Makers | 100 | |
| Williston | Vermont Astronomical Society | | |
| Manchester | Hildene Astronomy Club |
| Blacksburg | Astronomy Club of Virginia Tech | |
| Charlottesville | Charlottesville Astronomical Society | | |
| Chesapeake | Norfolk Astronomical Society | 25 |
| Fincastle | Roanoke Valley Astronomical Society |
| Fredericksburg | Rappahannock Astronomy Club | | |
| Middletown | Shenandoah Astronomical Society | 45 | |
| Richmond | Richmond Astronomical Society | | |
| Roanoke | Star City Astronomy Network | 10 | | |
| Virginia Beach | Back Bay Amateur Astronomers | | | |
| Franklin | Southampton Astronomers |
| Hampton | Skywatchers Astronomy Club |
| Bainbridge Island | Battle Point Astronomical Assn. | |
| Bellevue | East Side Astronomical Society | 140 |
| Custer | Whatcom Association of Celestial Observers | |
| Everett | Everett Astronomical Society | 60 | |
| Oak Harbor | Island County Astronomical Society | 30 | |
| Port Gamble | Olympic Astronomical Society | | |
| Richland | Tri-City Astronomy Club | 41 |
| Seattle | Seattle Astronomical Society | 235 | | | |
| Spokane | Spokane Astronomical Society | |
| Tacoma | Tacoma Astronomical Society | 175 | | | |
| Vancouver | Vancouver Sidewalk Astronomers | |
| Yakima | Yakima Valley Astronomy Club | 20 | |
| Friday Harbor | Sirius Dippers |
| Maple Valley | Maple Valley Astronomical Society |
| Maple valley | Maple Valley Astronomy |
| Pullman | Washington State University Astronomy Club |
| Seattle | Boeing Employees' Astronomical Society |
| Clarksburg | Central Appalachian Astronomy Club | 28 | | |
| Cross Lanes | Kanawha Valley Astronomical Society, Inc. |
| Huntington | Ohio Valley Astronomical Society | |
| Morgantown | Astronomy Club of West Virginia University |
| Wheeling | ASTROLABE Astronomy Club of Wheeling |
| Athens | The Astronomy Club of Southern West Virginia |
| Appleton | Northeast Wisconsin Stargazers | 75 | |
| Fall Creek | Chippewa Valley Astronomical Society | | |
| Franklin | Wehr Astronomical Society | |
| Green Bay | Neville Public Museum Astronomical Society | |
| LaCrosse | LaCrosse Area Astronomical Society | 50 | |
| Madison | Madison Astronomical Society |
| Milwaukee | Try Astronomy Milwaukee |
| New Berlin | Milwaukee Astronomical Society | | |
| Sheboygan | Sheboygan Astronomical Society | 30 |
| Sturgeon Bay | Door Peninsula Astronomical Society | |
| Union Grove | Racine Astronomical Society | | |
| Holmen | Holmen Astronomy Club |
| Casper | Central Wyoming Astronomical Society | |
| Cheyenne | Cheyenne Astronomical Society | |
| Laramie | Laramie Astronomical Soicety & Space Observers |
| Gillette | Campbell County High School Astronomy Club |
| Constantine | Sirius Astronomy Association | 70 | |
| BISHOFTU | BSSTC | 251 |
| Ahmedabad | Astronomy Club Ahmedabad | |
| Ulan Bator | Amateur Astronomy Club of Mongolia |
| Birgunj | Nepali Association for Astronomical Mission (NAAM) | 15 | |
| Hanoi | Vietnam Amateur Club of Astronomy (VACA) |
| Ho Chi Minh City | Ho Chi Minh City Amateur Astronomy Club (HAAC) |
| Canberra | Canberra Astronomical Society | |
| Coonabarabran | Astronomical Society of Coonabarabran | 30 | |
| Newcastle | Newcastle Astronomical Society, Inc. | |
| Sydney | Astronomical Society of New South Wales, Inc. | |
| Sydney | Northern Sydney Astronomical Society | | |
| Sydney | Western Sydney Amateur Astronomy Group | | |
| Wollongong | -Illawarra Astronomical Society, Inc. |
| Wollongong | The Wollongong Amateur Astronomy Club |
| Alice Springs | Astronomical Society of Alice Springs | |
| Karama | Darwin Amateur Astronomy Group | |
| Brisbane | Astronomical Association of Queensland | 100 | | |
| Brisbane | South East Queensland Astronomical Society | 26 | | |
| Bundaberg South | Bundaberg Astronomical Society, Inc. |
| Morningside | -Brisbane Astronomical Society, Inc. | |
| White Rock | Cairns Astronomy Group | |
| Bundaberg | Bundaberg Skywatchers |
| Adelaide | Astronomical Society of South Australia, Inc. | | |
| Bentleigh | Astronomical Society of Melbourne | |
| Adelaide | Flinders University Astronomcial Society | | |
| Cambridge | Astronomical Society of Tasmania, Inc. | | |
| Bendgo | Bendigo District Astronomical Society, Inc. | |
| Frankston | Mornington Peninsula Astronomical Society | | |
| Melbourne | Astronomical Society of Victoria, Inc. | |
| Mount Pleasant | Ballaarat Astronomical Society, Inc. | | |
| Snake Valley | Snake Valley Astronomical Association | |
| Traralgon BC | Latrobe Valley Astronomical Society, Inc. | |
| Perth | Astronomical Society of Western Australia | | |
| Calgary | RASC -- Calgary Centre | | |
| Edmonton | RASC -- Edmonton Centre | 225 | | | |
| Lethbridge | Lethbridge Astronomy Society | |
| Vulcan | Big Sky Astronomical Society | | |
| Drayton Valley | Ancient Light Astronomy Club |
| Edmonton | Edmonton Observers Group Network |
| Edmonton | SpaceAlberta, affiliated with Edmonton Observers |
| Abbotsford | Fraser Valley Astronomers Society |
| Kelowna | RASC -- Okanagan Centre | |
| Prince George | RASC -- Prince George Center | |
| Vancouver | RASC -- Vancouver | |
| Victoria | RASC -- Victoria Centre | 200 | |
| Winnibeg | RASC -- Winnipeg Centre |
| Riviere-Verte | Astro Club Borealis | |
| Saint John | RASC -- New Brunswick | |
| Dieppe | Beauséjour Astronomy Club Astronomie Beauséjour |
| Fredericton | RASC Moncton Centre, William Brydone Jack Unit |
| Hampton | Hampton Astronomy Club |
| Shippagan | Club d'astronomie de la Péninsule acadienne |
| Various in NB | RASC Moncton Centre |
| St. Johns | RASC -- St. John's Centre | |
| Halifax | RASC -- Halifax Centre |
| Wolfville | Minas Astronomy Group | 26 | |
| Sydney River | Cape Breton Astronomical Society |
| Hamilton | Hamilton Amateur Astronomers | 80 | | |
| Kingston | RASC -- Kingston Centre | |
| Kitchener/Waterloo | RASC -- Kitchener-Waterloo Centre | |
| London | RASC -- London Centre | 120 | | |
| London | St.Marys Astronomy Club | 12 |
| Milton | RASC -- Hamilton Centre | |
| Mooretown | RASC -- Sarnia Centre |
| Niagara Falls | RASC -- Niagara Centre | |
| North Bay | North Bay Astronomy Club |
| Oshawa | Durham Region Astronomical Association | |
| Ottawa | Ottawa Valley Astronomy and Observers Group | |
| Ottawa | RASC -- Ottawa Centre | |
| Peterborough | Peterborough Astronomical Association | |
| Ruthven | RASC -- Windsor Centre |
| Sudbury | Sudbury Astronomy Club | 30 |
| Thunder Bay | RASC -- Thunder Bay Centre | 40 | |
| Toronto | Astronomy and Space Exploration Society (U of T) | 1200 |
| Toronto | North York Astronomical Association |
| Toronto | RASC -- Toronto Centre | |
| York | York University Astronomy Club |
| Deep River | Deep River Astronomy Club |
| Manitoulin | Manitoulin Island Dark Sky Association |
| Port Elgin | Bruce County Astronomical Society |
| Thunder Bay | Thunder Bay Asronomy Group |
| Thunder Bay | Thunder Bay Observatory |
| Charlottetown | RASC -- Charlottetown Centre |
| Beloeil | Club d'Astronomie de Beloeil |
| Cap-Rouge | Club d'astronomie VÉGA de Cap-Rouge |
| Centre-Mauricie | Club des Astronomes Amateurs Centre-Mauricie |
| Dorval | Club d'Astronomie de Dorval | 50 |
| Drummondville | Club d'Astronomie Drummondville, Inc. |
| Laval | Club des Astronomes Amateurs de Laval |
| Lévis | Club d'Astronomie du CEGEP Lévis-Lauzon |
| Longueuil | Club des Astronomes Amateurs de Longueuil |
| Montréal | Groupe Astro & CCD | 37 |
| Montréal | La Société d'Astronomie de Montréal | 100 |
| Montréal | RASC -- Montréal Centre |
| Pierre-de-Coubertin | Fédération des Astronomes Amateurs du Québec |
| Québec | RASC -- Québec Centre |
| Rimouski | Club d'Astronomie de l'U. du Québec a Rimouski |
| Saguenay | Club d'Astronomie Sirius |
| Sherbrooke | Club des Astronomes Amateurs de Sherbrooke |
| Sillery | Club d'astronomie Cassiopée de Sillery |
| Trois-Riviegrave;res | Club d'Astronomie Jupiter, Inc. |
| Valleyfield | Club d'Astronomie Orion de Saint-Timothée |
| Regina | RASC -- Regina Centre |
| Saskatoon | RASC -- Saskatoon Centre | | |
| Castries | St.Lucia Royal Astronomy Club | 50 |
| Prague | Czech Astronomical Society |
| Nürnberg | Nürnberger Astronomische Arbeitsgeminschaft |
| Tübingen | Institut für Astronomie und Astrophysik |
| Limerick | Shannonside Astronomy | 50 |
| Tullamore | Tullamore Astronomical Society |
| Milan | Circolo Astrofili Astrum Caeli | 17 |
| San Luis Potosí | Sociedad Astronómica Julieta Fierro Gossman | 30 |
| Royal Astronomical Society of New Zealand |
| Ashburton | Canterbury Astronomical Society, Ashburton Branch |
| Christchurch | Canterbury Astronomical Society |
| Auckland | Auckland Astronomical Society | 600 |
| Invercargill | Southland Astronomical Society |
| New Plymouth | New Plymouth Astronomical Society |
| Wellington | Phoenix Astronomical Society |
| Wellington | Wellington Astronomical Society |
| Telescope Group | 10 |
| Valparaíso | Sociedad Astronómica de Valparaíso y Viña del Mar. |
| Colombo | IYA 2009 Sri Lanka | 55 | |
| Colombo | SkyLK | 100 | |
| Abingdon | Abingdon Astronomical Society | 70 |
| Barrow-in-Furness | Furness & South Lakeland Astronomical Society | 15 |
| Batley | Batley & Spenborough Astronomical Society |
| Bedford | Bedford Astronomical Society |
| Bingley | Hebden Bridge Astronomy Society |
| Birmingham | Heart of England Astronomical Society |
| Blackpool | Blackpool & District Astronomical Society |
| Bognor Regis | South Downs Astronomical Society |
| Bolton | Bolton Astronomical Society |
| Bracknell | Herschel Astronomical Society |
| Bradford | Bradford Astronomical Society | 70 |
| Bridgwater | Bridgwater Astronomical Society | 20 |
| Brighton | Brighton and Hove Astronomical Society |
| Bristol | Bristol Astronomical Society |
| Burghfield | Newbury Amateur Astronomical Society |
| Cambridge | Cambridge Astronomical Association | 1000 | |
| Chatham | Mid-Kent Astronomical Society |
| Chesterfield | Chesterfield Astronomical Society |
| Chichester | Southern Area Group of Astronomical Societies |
| Clacton on Sea | Clacton & District Astronomical Association |
| clanfield | HantsAstro | 80+ |
| Cleveland | Cleveland & Darlington Astronomical Society |
| Condover | Shropshire Astronomical Society |
| Coventry | Coventry & Warwickshire Astronomical Society |
| Crayford | Crayford Manor House Astronomical Society |
| Croydon | Croydon Astronomical Society | 80 |
| Derby | Derby & District Astronomical Society |
| Durham City | Durham University Astronomical Society |
| Eastbourne | Eastbourne Astronomical Society |
| Elloughton | East Riding Astronomers | 36 |
| Exeter | Exeter Astronomical Society |
| Farnham | Farnham Astronomical Society |
| Folkestone | South East Kent Astronomical Society |
| Gatley | Altrincham & District Astronomical Society |
| Giltbrook | Nottingham Astronomical Society |
| Guildford | Guildford Astronomical Society |
| Hampshire | Hampshire Astronomical Group | 130 |
| Hoole | Chester Astronomical Society |
| Horsham | Horsham Astronomy Group |
| Huddersfield | Huddersfield Astronomical & Philosophical Society |
| Ipswich | Orwell Astronomical Society |
| Ipswich | Orwell Astronomical Society (Ipswich) |
| Lancaster | Lancaster & Morecambe Astronomical Society |
| Leeds | Leeds Astronomical Society | 40 |
| Leicester | Leicester University Astronomical Society |
| Letchworth | Letchworth & District Astronomical Society |
| Lincoln | Lincoln Astronomical Society | 45 |
| Liverpool | Liverpool Astronomical Society |
| London | British Astronomical Association |
| London | Society for Popular Astronomy |
| Maidenhead | Maidenhead Astronomical Society |
| Manchester | Manchester Astronomical Society |
| Mexborough | Mexborough & Swinton Astronomical Society |
| Milton Keynes | Milton Keynes Astronomical Society | 30 |
| Newcastle-Under-Lyme | North Staffordshire Astronomical Society |
| North Cornelly | Federation of Astronomical Societies |
| North Devon | North Devon Astronomical Society |
| North West London | South West Herts Astronomical Society |
| Northampton | Northamptonshire Natural History Society, Astronom |
| Norwich | Breckland Astronomical Society |
| Norwich | Norwich Astronomical Society | 140 |
| Nottingham | Ilkeston & District Astronomical Society |
| Nottinghamshire | Mansfield & Sutton Astronomical Society |
| Orpington | Orpington Astronomical Society |
| Peterborough | Peterborough Astronomical Society |
| Plymouth | Plymouth Astronomical Society | 40 |
| Pontefract | West Yorkshire Astronomical Society |
| Rayleigh | Castle Point Astronomical Club |
| Sale | Macclesfield Astronomical Society |
| Shinfield | Reading Astronomical Society |
| Shirley | Southampton Astronomical Society |
| Spalding | South Lincolnshire Astronomical & Geophysical Soci | 40 |
| Sunderland | Sunderland Astronomical Society |
| Sutton | Birmingham Astronomical Society |
| Thame | Aylesbury Astronomical Society |
| Theydon Bois | Loughton Astronomical Society |
| Wellingborough | Northants Amateur Astronomers |
| West Ewell | Ewell Astronomical Society |
| Whittington | Welsh Border Astronomers |
| Witham | North Essex Astronomical Society |
| Worcester | Worcester Astronomical Society |
| Worthing | Worthing Astronomers | 80 + | |
| Wrea Green | Preston & District Astronomical Society |
| Wycombe | Wycombe Astronomical Society |
| York | York Astronomical Society |
| St Peter Port | Guernsey Astronomy Society | 60 |
| Peel | Isle of Man Astronomical Society |
| Aberdeen | Aberdeen & District Astronomical Society |
| Dundee | Dundee Astronomical Society |
| Dunfermline | Dunfermline Astronomical Society | 70 |
| Edinburgh | Astronomical Society of Edinburgh |
| Glasgow | Astronomical Society of Glasgow | |
| Inverness | Highland Astronomical Society | 76 |
| Cardiff | Cardiff Astronomical Society | 250 |
| Gowerton | Swansea Astronomical Society |
| Llanrug | Gwynedd Astronomical Society |
| Llanrug | Northwest Group of Astronomical Societies |
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