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  • welcome to

    macarthur astronomical society

  • observe

    Astronomers use scientific observation to learn about the Universe we live in. It's a beautiful place and, as a group of keen amateur astronomers, M.A.S. members have it as their common interest. We observe from two southern Sydney locations.

  • photograph

    Along with our "visual" observers, we have a group of dedicated astrophotographers within our ranks. This group find that photographing deep sky objects with high-quality cameras brings out the colour which your own eyes are unable to detect. See our photographs and you'll want to take your own.

  • educate

    Come to a Macarthur Astronomy Forum evening, held at UWS Campbelltown, to hear talks given by Australian and international professional astronomers as well as from amateurs with interests in their own specific fields. Entry is free for all.

  • events

    M.A.S. members are deeply committed to sharing our combined knowledge of, and love for, the night sky and the science of astronomy. We hold public open nights during the year - keep watching out for "What's On".

Macarthur Astronomical Society

G'day From Sydney, Australia

We are amateur astronomers based in the Campbelltown, Camden and Wollondilly region of NSW.



Formed in 1996, membership of our society of diverse and enthusiastic amateur astronomers currently stands at over one hundred!

Centred on the local government areas of Campelltown, Camden and Wollondilly, our activities extend across the Greater South Western region of Sydney. 

Our Patron is astrophysicist Professor Bryan Gaensler - 1999 Young Australian of the Year - currently Director of the Dunlap Institute for Astronomy and Astrophysics at The University of Toronto, Canada.


We conduct the monthly Macarthur Astronomy Forum at the Campbelltown Campus of Western Sydney University.

We hold public astronomy nights in collaboration with Campbelltown Rotary Observatory at Western Sydney University and dark sky observing sessions for our members.

Macarthur Astronomy Forum

Third* Monday of the Month


Monday 24th April

*Fourth Monday for this month only

Annual General Meeting

Please visit our
Meetings and Events page
 for full details.


Annual General Meeting

Monday 24th April

Notice is given that the 2017 Annual General Meeting will be held on Monday 24th April in the Small Lecture Theatre (Room G.213), School of Medicine (Building 30), Western Sydney University, Goldsmith Avenue, Campbelltown, NSW. Please note that to avoid the public holiday, this is the fourth Monday of April. 

Full details are on our What's On page.

Public Night

Live Stargazing


Public Observing at Western Sydney University

Saturday 3rd June

Live stargazing at Campbelltown Rotary Observatory: from 5.30 pm


MAS Image of the Week

NGC 6188 by MAS member, Bryan Pablo

Located in the constellation Ara, NGC 6188 lies about 4000 light years away from Earth. The bright open cluster of stars NGC 6193 is responsible for lighting up the central region of the nebulosity within NGC 6188.

Image© Bryan Pablo, Macarthur Astronomical Society

 Don't forget our next Live Stargazing event, right here in Campbelltown on Saturday 3rd June.






The Guinness World Record for the 'Highest Number of Stargazers Across Multiple Sites At One Time' is held by MAS jointly with ANU and 35 other sites across Australia.

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