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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

Amateur Astronomers 

With over 120 members from across the SW region of Sydney, Australia, 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

Dr Luke Barnes (University of Sydney)

19th March, 7.30 pm

Details on our News and Events page.




MAS Image of the Week

Running Man Nebula NGC 1975 in Orion

Image by Mark Johnston, 9 x 5 min subs, GSO RC 10 with Astro-Physics reducer on the Meade fork mount.

Image  ©  Mark Johnston (Macarthur Astronomical Society).
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