American Astronautical Society
American Institute of Aeronautics and Astronautics (AIAA)
Australian Space Research Institute (ASRI)

British Interplanetary Society (BIS)

Canadian Space Society (CSS)
Committee on Space Research (COSPAR)

German Rocket Society
GIRD (Gruppa Isutcheniya Reaktivnovo Dvisheniya

International Astronautical Federation (IAF)
International Astronomical Union (IAU)
International Dark-Sky Association

L5 Society
Lunar Society of Birmingham

National Space Club
National Space Society

Planetary Society

Reaction Research Society (RRS)
Royal Astronomical Society
Royal Institution

Smithsonian Institution
Space Foundation
Space Frontier Foundation
Space Studies Institute
Spaceguard Foundation

Universities Space Research Association (USRA)

Verein für Raumschiffahrt (VfR)