| Astronomy Organizations |
| Israeli Astronomical Association |
| American Association of Variable Star Observers |
| American Astronomical Society |
| Association of Lunar and Planetary Observers |
| Association of Universities for Research in Astronomy |
| Associazione Friulana di Astronomia e Meteorologia |
| Astronomische Gesellschaft |
| Astronomische Vereinigung Kärntens |
| Astronomy Ireland |
| AstronomyOutreach network |
| Astrophysical Institute Potsdam |
| Bangladesh Astronomical Association |
| Bangladesh Astronomical Society |
| British Astronomical Association |
| British National Committee for Space Research |
| COSPAR |
| Central Bureau for Astronomical Telegrams |
| Centro de Investigaciones de Astronomia |
| CieloBuio |
| Coalition for Space Exploration |
| Division for Planetary Sciences |
| Eurasian Astronomical Society |
| Europlanet |
| Federation of Astronomical Societies |
| Florida Space Authority |
| Heavens-Above |
| Instituto de Astrofísica de Andalucía |
| Inter-University Centre for Astronomy and Astrophysics |
| International Astronomical Union |
| International Dark-Sky Association |
| International Earth Rotation and Reference Systems Service |
| International Fellowship of Rotarian Amateur Astronomers |
| International Space Development Conference |
| Irish Astronomical Society |
| Irish Federation of Astronomical Societies |
| Junior Astronomical Society |
| Lunar Explorers Society |
| Middle Atlantic Planetarium Society |
| Minor Planet Center |
| Minor planet designation |
| Moon Society |
| National Space Institute |
| National Space Society |
| Nuker Team |
| Astronomical Society of the Pacific |
| Particle Physics and Astronomy Research Council |
| Phoenix Astronomical Society |
| The Planetary Society |
| ProSpace |
| Quasar Equatorial Survey Team |
| Research Consortium on Nearby Stars |
| Royal Astronomical Society |
| Royal Astronomical Society of Canada |
| Société d'astronomie de Montréal |
| Astronomical Society of Southern Africa |
| Space Access Society |
| Space Exploration Alliance |
| Space Frontier Foundation |
| Space Nursing Society |
| Spaceturk |
| Starlink Project |
| Stellafane |
| Unione Astrofili Italiani |
| Ursa (Finland) |
| Vereinigte Astronomische Gesellschaft |
| Yamaneko Group of Comet Observers |
| Young Astronaut Council |
