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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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Reach for the Sky


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


Macarthur Astronomy Forum

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Prof. Fred Watson



17th February 7.30 pm


Cosmic Chronicles

Venue : Western Sydney University, Campbelltown Campus
Building 30, Goldsmith Avenue, Campbelltown, NSW 2560

Public admission free: gold coin donations gratefully accepted. 

Forum details: News and Events

Location: see map > HERE <  



Geraint Lewis Our New Patron


2016 02 15 MAS 20th Geraint Lewis Square

We are proud to announce that Professor Geraint Lewis has agreed to become Patron of Macarthur Astronomical Society.

Geraint is an Astro-physicist at The University of Sydney, where his research includes the influence of dark energy and dark matter on the evolution and ultimate fate of the Universe; gravitational lensing, quasars, galactic cannibalism and the evolution of galaxies.

He has been a regular guest speaker at our Macarthur Astronomy Forum and has also been an active supporter of our activities.

Full details on our Patron Page.

Following the appointment, Geraint said he is delighted to accept the position of Patron of the Macarthur Astronomical Society:

"Over the last twelve years, I have spoken to the Society on many occasions and am always struck by their enthusiasm for unravelling the secrets of the universe. I have keenly followed the Society in its laudable goal of sharing the wonders of the night sky with the general public, especially the younger generations, and am excited to join them on their future endeavours".

Welcome, Geraint!











 MAS supports the mission of the Australian Dark Sky Alliance






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