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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 Astronomy in South Western Sydney

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Welcome to MAS!

We are amateur astronomers in the South Western Region of Sydney, Australia, including Campbelltown, Camden, Liverpool and Wollondilly local government areas of NSW.

We hold regular dark sky observing sessions for our members to advance our skills.

We bring local and international guest speakers to address our monthly Macarthur Astronomy Forum at the Campbelltown Campus of Western Sydney University.

We organise public astronomy nights in collaboration with Campbelltown Rotary Observatory at Western Sydney University and we collaborate with local institutions to maximise knowledge of the Universe in the local community - including school mentoring.



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Annual General Meeting

Monday 15th April

Details on our News & Events page




Macarthur Astronomy Forum

Monday 15th April, 7.30 pm 

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Prof Tara Murphy

(University of Sydney)


 The detection of gravitational waves from a neutron star merger


Details: News and Events                  

Speakers Corner

Be inspired on YouTube by our guest speakers!

Watch this amazing video of the Universe by Ángel R. López-Sánchez, published by AAO.


Watch these talks by Fred Watson, Geraint Lewis, Luke Barnes, Lisa Harvey-Smith and Charley Lineweaver:

Dark Sky Fred    






MAS Top Shot

M42 Nebula in Orion

Image by Phillip Kidd

Image © Phil Kidd (MAS)


Whens the next stargazing night                                                  







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