- American Association of Variable Star Observers (AAVSO)
Both amateur and professional.
www.aavso.org
- Astronomical Society of the Pacific
International nonprofit organization offering educational programs and products, research publications, and membership benefits.
www.astrosociety.org
- Czech Astronomy Society
Events, links, articles from leading Czech and foreign magazines.
www.astro.cz
- Royal Astronomical Society of Canada, The (RASC)
Canada's oldest astronomical society, dedicated to the advancement of astronomy and allied sciences.
www.rasc.ca
- Night Sky Network
Nationwide coalition of astronomy clubs bringing the science and inspiration of NASA's mission to the public. Founded by JPL's PlanetQuest program.
nightsky.jpl.nasa.gov
- Jordanian Astronomical Society (JAS)
www.jas.org.jo
- Amateur Telescope Makers of Boston
Membership is open to all those interested in pursuing astronomy as a hobby.
www.atmob.org
- Center for Backyard Astrophysics (CBA)
Global network of small telescopes dedicated to photometry of cataclysmic variables.
cba.phys.columbia.edu
- American Association of Amateur Astronomers
Observing awards, quarterly newsletter and membership in the Astronomical League.
www.corvus.com
- Royal Astronomical Society of New Zealand
Professional and amateur astronomers in New Zealand and Australia.
www.rasnz.org.nz
- Hawaiian Astronomical Society@
dir.yahoo.com/.../Science/Astronomy
- Custer Institute and Observatory
Amateur astronomy education center located on The North Fork of Long Island.
www.custerobservatory.org
- Los Angeles Astronomical Society
Features star party and general meeting information as well as public education resources.
www.laas.org
- Sidewalk Astronomers
Nonprofit organization dedicated to bring Astronomy to the public.
www.sidewalkastronomers.us
- Minnesota Astronomical Society
Founded in 1972, promotes amateur astronomy and astronomy education.
www.mnastro.org
- Astronomical League of the Philippines
Fosters awareness, interest, and understanding in amateur astronomy.
www.astroleaguephils.org
- Von Braun Astronomial Society
Volunteer organization of amateur and professional astronomers that operate a planetarium and observatory located in Monte Sano State Park.
www.vbas.org
- Oil Region Astronomical Society
Group of men, women, and youths who share their equipment and knowledge of the stars in an effort to promote the fundamentals of astronomy and space science.
www.oras.org
- AOAS
Offers astronomy classes and workshops. Includes photo gallery, forum, FAQs, and downloads.
www.aoas.org
- Astronomical Society of Singapore, The
Up-to-date details on sky events, photos, and feature articles about the heavens.
tasos.org.sg
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