What Is the Macarthur Astronomical Society Website?

macastro.org.au is the official website of the Macarthur Astronomical Society (MAS), an amateur astronomy club based in south-western Sydney, Australia. The site is aimed at two audiences: members who take part in regular observing nights and imaging groups, and the general public, who can attend the society's monthly astronomy forum for free. If you are looking for a local astronomy club to join, a free public talk on astronomy, or practical guidance on telescopes and astrophotography, this site is the starting point.

Who runs it and when it started

The society was founded in 1996 and describes itself as a group of amateur astronomers in south-western Sydney. It operates as an incorporated association and has a patron, Professor Geraint Lewis, an astrophysicist at the University of Sydney's School of Physics, who has been an annual guest speaker at MAS since 2008.

What the society actually does

The site lists four main strands of activity:

• Dark sky sessions – regular observing nights, scheduled for members only.
• Field workshops – practical sessions on finding your way around the sky and getting the most out of your telescope.
• Astro Imaging Group (AIG) – a group for members interested in astrophotography, focused on knowledge sharing, learning and camaraderie.
• Macarthur Astronomy Forum – a monthly public event where professional astronomers present their latest research.

The Macarthur Astronomy Forum

This is the most accessible part of the site for non-members. The forum is held monthly in collaboration with Western Sydney University (Campbelltown), is open to the public with free entry, and is also available to members on Zoom. Australian and international guest speakers present current research.

A concrete example from the site: on 21 September, the speaker is Marnie Ogg (described as a Dark Sky Defender), presenting "The Night Is Not Lost: Preserving the Future of Dark Skies in Australia."

Partnership and public outreach

MAS describes itself as a community outreach partner of Western Sydney University, and the site notes that WSU Provost Professor Sarah Lewis welcomed astronomer Professor Fred Watson AM at a recent forum. Beyond the forum, the society visits schools and other local institutions to give talks, and frames its amateur members as collaborating with local institutions to broaden public understanding of the universe.

What you can find on the site

How to use it

• If you want to attend a free public talk: check the Notice Board for the next Macarthur Astronomy Forum date and speaker, then attend in person at the WSU Campbelltown collaboration or, for members, via Zoom.
• If you want to observe regularly: note that field nights are members only, so joining MAS is the route in.
• If you are into astrophotography: the Astro Imaging Group page is the relevant entry point.
• If you want to read or write practical astronomy content: the Articles page collects member-written pieces and accepts new contributions.

One thing the site makes clear by omission: it does not publish membership pricing or a sign-up form in the material available here, so anyone interested in joining should treat the Notice Board and the "Join MAS" prompt as the starting point rather than expecting costs to be listed up front.