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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.

Whens the next stargazing night


MAS Top Shot


88% Gibbous Moon, taken by MAS member Dave Manning, April 16th.
75% of 123 frames, 1/1000sec ISO800.
Sony a7r Mk2 on Skywatcher 120mm Esprit Triplet Refractor.

Image © Dave Manning (MAS)


Macarthur Astronomy Forum

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Dr Emil Lenc (CSIRO)

Monday 20th May, 7.30 pm 


Forum details: News and Events


Speakers Corner

Be inspired!

Watch these talks by some of our guest speakers: Fred Watson, Geraint Lewis & Luke Barnes, Lisa Harvey-Smith and Charley Lineweaver, Ángel R. López-Sánchez and Tara Murphy:

Dark Sky Fred    






Whens the next stargazing night    









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