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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

Our primary objective is to promote an understanding of the science of astronomy.


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, inviting career astronomers from Australia and abroad to present their cutting edge research.

We hold public astronomy nights in collaboration with Campbelltown Rotary Observatory at Western Sydney University; photographic exhibitions; dark sky observing sessions for our members; and tours to astronomical facilities in Australia and overseas.



At a time of accelerating scientific research and public interest, we believe there's never been a more exciting time to be an astronomer!

We strive to build relationships with regional institutions, including traditional land owners, community leaders, local councils, schools, universities, CSIRO and NASA.

We seek increased membership, financial growth and the technical excellence to empower future acquisition of advanced astronomical equipment and property in which to house it. 


Macarthur Astronomy Forum

Third Monday of the Month


Monday 21st November "Aurora Chasing" with Mohammed Baddah (and friends)
 Please  see our Meetings and Events page for full details.




MAS Image of the Week


 The brightest star in the Southern Cross. A double star at a distance of 321 light-years.

Image © Luke Williams (Macarthur Astronomical Society)




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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