Macarthur Astronomical Society

Stargard Moonset

Webmaster’s Pick

Southern Pinwheel

Get Well Soon Frank!

Click to enlarge!

See our Macastro Gallery for more stunning night sky photography from MAS members.

Pick List

Next Guest Speaker

Prof Roberto Soria

Macarthur Astronomy Forum

Monday 17th June

See details on Noticeboard page


Professor Geraint Lewis

Cosmologist, Astrophysicist, Teacher, Author, Public Speaker

Professor of Astrophysics at the Sydney Institute for Astronomy at the University of Sydney School of Physics. MAS Patron and an annual guest speaker at MAS since 2008.

Geraint’s Home page


What We Do

Dark sky observing sessions for members and beginners workshops.

Macarthur Astronomy Forum, bringing local and international professional astronomers to address us on their research.

We collaborate with Western Sydney University and other local institutions to broaden public understanding of the Universe.


Western Sydney University

We are proud community outreach partners with WSU.

Join MAS

Expand Your Universe

Curious about the Universe that we live in?
Then why not join MAS!

Observing Nights

Members Only

Dates for our upcoming members only dark sky observing nights are listed on our Notice Board page.

Macarthur Astronomy Forum

Monthly Meetings with Guest Speakers.

Held at Western Sydney University (Campbelltown) and open to the public.

See Notice Board for further details.

Macastro Articles

Telescopes, Amateur Astronomy & More

A collection of articles written by our members, for our members.
Visit here to read about practical astronomy or contribute a new article.

See Articles Page

Public Outreach

Sharing our Universe

We visit schools and other local institutions to talk about our passion for astronomy and to show the night sky.

See Outreach page

Beginners Workshops

Learning To Use Your Telescope

A great opportunity to meet other members, find your way around the sky and learn how to get the most out of your telescope.

See Workshop page

Macastro Tours

Local and International

We organise tours for members to visit astronomical facilities.
Past tours have included observatories in NSW, Canberra, China, Peru and Chile.

See Tours Page


Return and Earn

We encourage our members to support the NSW Government’s Return and Earn plastic & glass bottle recycling scheme. Select Macarthur Astronomical Society using your barcode card at a reverse vending centre near you to donate the proceeds to MAS.

See Return and Earn Page


Frequently Asked Questions

Can’t find what you want?

See FAQ page


Please stay at home

If you or a family member are showing any symptoms of covid, influenza or the common cold etc. please do not attend any of our events. Thank you!

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