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American Association of Variable Star Observers (AAVSO)
American Astronomical Society
American Meteor Society
The Artemis Society
Association of Lunar and Planetary Observers (ALPO)
The Astronomical League
International Dark Sky Association
International Meteor Organization
The Meteoritical Society
The Planetary Society
North American Meteor Network (NAMN)
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Enchanted Skies Star Party (New Mexico)
Mason-Dixon Star Party (Pennsylvania)
Mid-Atlantic Star Party (North Carolina)
Nebraska Star Party
NOVAC Star Party (Virginia)
Okie-Tex Star Party (Oklahoma)
Oregon Star Party
SCAS Winter Star Party (Florida)
Riverside Telescope Makers Conference (California)
South Jersey Star Party (New Jersey)
Stellafane Convention (Vermont)
Table Mountain Star Party (Washington)
Texas Star Party
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Auburn Astronomical Society
Birmingham Astronomical Society
Mobile Astronomical Society
Von Braun Astronomical Society
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East Valley Astronomy Club
Huachuca Astronomy Club
 Phoenix Astronomical Society
Saguaro Astronomy Club
Tucson Amateur Astronomy Association
University of Arizona Astronomy Club
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Arkansas / Oklahoma Astronomical Society
Central Arkansas Astronomical Society
River Valley Stargazers
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Astronomical Association of Northern California
Astronomical Society of the Pacific
Astronomy Club at UC Davis
The Astronomy Connection
Central Coast Astronomical Society
Central Valley Astronomers
Eastbay Astronomical Society
FirstLight Astronomy Club
Fremont Peak Observatory Association
Halls Valley Astronomical Group
Kern Astronomical Society
The Local Group of Santa Clarita Valley
Los Angeles Astronomical Society
Los Angeles Valley Astronomy Club
Los Angeles Sidewalk Astronomers
Mount Diablo Astronomical Society
Mount Wilson Observatory Association
Orange County Astronomers
Peninsula Astronomical Society
Pomona Valley Amateur Astronomers
Riverside Astronomical Society
Sacramento Valley Astronomical Society
San Diego Astronomy Association
San Francisco Amateur Astronomers
San Francisco Sidewalk Astronomers
San Jose Astronomical Association
San Mateo Astronomical Society
Santa Cruz Astronomy Club
South Bay Astronomical Society
Stockton Astronomical Society
Tri-Valley Stargazers
Ventura County Astronomical Society
The Western Observatorium
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Colorado Springs Astronomical Society
Denver Astronomical Society
Front Range Astronomical Super Cluster
Longmont Astronomical Society
Northern Colorado Astronomical Society
Western Colorado Astronomy Club
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Astronomical Society of Greater Hartford
Astronomical Society of New Haven
Litchfield Hills Amateur Astronomy Club
Westport Astronomical Society
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Delaware Astronomical Society
Delmarva Stargazers
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Alachua Astronomy Club
Astronomical Society of the Palm Beaches
Central Florida Astronomical Society
Escambia Amateur Astronomers' Association
Everglades Astronomical Society
Northeast Florida Astronomical Society
South Florida Amateur Astronomers Association
 South West Florida Astronomical Society
Southern Cross Astronomical Society
St. Petersburg Astronomy Club
Tallahassee Astronomical Society
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Astronomy Club of Augusta
Atlanta Astronomy Club
Oglethorpe Astronomical Association
Statesboro Astronomy Club
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Hawaiian Astronomical Society
Meteor Group Hawaii
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Boise Astronomical Society
Magic Valley Astronomical Society
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Astronomical Association of Southern Illinois
Astronomical Society of the University of Illinois
Champaign Urbana Astronomical Society
Chicago Astronomical Society
Lake County Astronomical Society
Naperville Astronomical Association
Northwest Suburban Astronomers
Peoria Astronomical Society
Ryerson Astronomical Society
Skokie Valley Astronomers
Twin City Amateur Astronomers
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Calumet Astronomical Society
Evansville Astronomical Society
Fort Wayne Astronomical Society
Indiana Astronomical Society
Michiana Astronomical Society
Wabash Valley Astronomical Society
Warsaw Astronomical Society
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Ames Area Amateur Astronomers
Cedar Amateur Astronomers
Des Moines Astronomical Society
Southeastern Iowa Astronomy Club
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Heartland Astronomical Research Team
Kansas Astronomical Observers
Northeast Kansas Amateur Astronomers' League
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Louisville Astronomical Society
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ArkLaTex Sidewalk Astronomers
Baton Rouge Astronomical Society
The Pontchartrain Astronomy Society
Shreveport-Bossier Astronomical Society
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Astronomical Society of Northern New England
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Baltimore Astronomical Society
Cumberland Astronomy Club
Goddard Astronomy Club
Greenbelt Astronomy Club
Harford County Astronomical Society
National Capital Astronomers
Northern Virginia Astronomy Club
Southern Maryland Astronomical Society
Westminster Astronomical Society of Maryland
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Aldrich Astronomical Society
Amateur Telescope Makers of Boston
Amherst Astronomy Association
Astronomical Society of Southern New England
Martha's Vineyard Amateur Astronomy Club
North Shore Amateur Astronomy Club
Pittsfield Astronomy Club
Springfield Stars Club
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Amateur Astronomers of Jackson
Capital Area Astronomy Club
Eastern Michigan University Astronomy Club
Genesee Astronomical Society
Grand Rapids Amateur Astronomical Association
Grand Traverse Astronomical Society
Kalamazoo Astronomical Society
Oakland Astronomy Club
Shoreline Amateur Astronomical Association
University Lowbrow Astronomers
Warren Astronomical Society
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Minnesota Astronomical Society
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Jackson Astronomical Association
Rainwater Astronomical Association
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Astronomical Society of Kansas City
Central Missouri Astronomical Association
St. Louis Astronomical Society
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Mission Valley Astronomy Club
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Omaha Astronomical Society
Prairie Astronomy Club
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Las Vegas Astronomical Society
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New Hampshire Astronomical Society
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Amateur Astronomers' Association of Princeton
Amateur Astronomers, Inc.
Astronomical Society of the Toms River Area
Concordia Astronomy Club
Dark Sky Observers
Hopatcong Area Amateur Astronomers
Montclair Telescope Club
Morris Museum Astronomical Society
New Jersey Astronomical Association
North Jersey Astronomical Group
Rittenhouse Astronomical Society
Rockland Astronomy Club
Sheep Hill Astronomical Association
Skyland Star Gazers
South Jersey Astronomy Club
Society for Telescopy, Astronomy and Radio
United Astronomy Clubs of New Jersey
Willingboro Astronomical Society
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Albuquerque Astronomical Society
Astronomical Society of Las Cruces
New Mexico Tech Astronomy Club
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Albany Area Amateur Astronomers
Amateur Astronomers Association of New York
Amateur Observers Society of New York
Astronomical Society of Long Island
Astronomy Section of the Rochester Academy of Science
Buffalo Astronomical Association
Kopernik Astronomical Society
Martz Astronomical Association
Mid-Hudson Astronomy Association
Syracuse Astronomical Society
Westchester Amateur Astronomers
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Catawba Valley Astronomy Club
Charlotte Amateur Astronomers Club
Foothills Astronomical Society
Forsyth Astronomical Society
Piedmont Amateur Astronomers
Raleigh Astronomy Club
Starfax Astronomy Club
Triad Action Astronomy Club
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Black River Astronomical Society
Chagrin Valley Astronomical Society
Columbus Astronomical Society
Mahoning Valley Astronomical Society
Medina County Astronomical Society
Miami Valley Astronomical Society
Millstream Astronomy Club
Ohio Turnpike Astronomers Association
Richland Astronomical Society
Stillwater Stargazers
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Oklahoma City Astronomy Club
Oklahoma State University Astronomy Club
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Eugene Astronomical Society
North West Astronomy Group
Rose City Astronomers
Southern Oregon Skywatchers
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Amateur Astronomers Association of Pittsburgh
Astronomical Society of Harrisburg
Berks County Amateur Astronomical Society
Bucks-Mont Astronomical Association
Central Pennsylvania Observers
Chesmont Astronomical Society
Delaware Valley Amateur Astronomers
Lackawanna Astronomical Society
Lehigh Valley Amateur Astronomical Society
Oil Region Astronomical Society
Penn State Astronomy Club
Susquehanna Valley Amateur Astronomers
Villanova Astronomical Society
York County Astronomical Society
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Celestial Observers of Rhode Island
The Skyscrapers
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Midlands Astronomy Club
Roper Mountain Astronomers
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Barnard Astronomical Society
Barnard-Seyfert Astronomical Society
Cumberland Astronomical Society
Memphis Astronomical Society
Middle Tennessee Astronomical Society
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Association of Amateur Astronomers Texas A&M
Astronomical Society of East Texas
Austin Astronomical Society
Big Bend Astronomical Society
Central Texas Astronomical Society
Crossroads Astronomy Club
El Paso Astronomy Club
Fort Bend Astronomy Club
Fort Worth Astronomical Society
Houston Astronomical Society
Johnson Space Center Astronomical Society
North Texas Skywatch
Olympus Mons
San Angelo Amateur Astronomy Association
San Antonio Astronomical Observers Group
San Antonio Astronomical Association
Texas Astronomical Society of Dallas
West Texas Astronomers
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Ogden Astronomical Society
Salt Lake Astronomical Society
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Springfield Telescope Makers
Vermont Astronomical Society
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Astronomy Club of Virginia Tech
Northern Virginia Astronomy Club
Ohio Valley Astronomical Society
Richmond Astronomical Society
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Battle Point Astronomical Association
Boeing Employee's Astronomical Society
Everett AStronomical Society
Seattle Astronomical Society
Spokane Astronomical Society
Squak Mountain Telescope Gang
Tacoma Astronomical Society
Tri-City Astronomy Club of Southeastern Washington
Whatcom Association of Celestial Observers
Yakima Valley Astronomy Club
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Astrolabe Astronomy Club
Central Appalachain Astronomy Club
Kanawha Valley Astronomical Society
West Virginia University Astronomy Club
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Chippewa Valley Astronomical Society
Madison Astronomical Society
Milwaukee Astronomical Society
Northern Cross Science Foundation
Racine Astronomical Society
Sheboygan Astronomical Society
Wehr Astronomical Society
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Cheyenne Astronomical Society
Jackson Hole Astronomy Club
Laramie Astronomical Society and Space Observers
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