Welcome to the Astronomical Society of South Australia

The Astronomical Society of South Australia is the only representative body for amateur astronomy in the state of South Australia. Founded in 1892 and with around 600 members, it is the oldest and one of the largest organisations of its kind in Australia.

Our monthly meetings, which usually feature a guest speaker, are free, open to the public and visitors are most welcome to attend.

Astrophysics Astronomy Education

Wednesday, 4 December 2019 7:00 PM

You don’t need a degree in Astrophysics to attend this presentation! Find out how the planets stay in orbit around the Sun. Discover the mysteries of General Relativity and the inner workings of the Universe.

The Galactic Centre: A Window into the Future & AGM General Meeting

Wednesday, 4 December 2019 8:00 PM

The centre of our Galaxy harbours a massive black hole, Sgr A*, that is likely to be the oldest component of the Galaxy along with the invisible dark matter around it. How this amazing object came into existence and evolved over 13 billion years is intimately linked to the nature of the first stars, the chemical elements today and the evolution of dark matter and gas. Sgr A* is one of the fastest developing fields in astrophysics where discoveries are made every year. For example, the most energetic particles ever detected by IceCube in Antarctica, and by telescopes in Namibia and Argentina, are thought to have been created at the Galactic Centre. Our x-ray and infrared satellites pick up flaring activity near the black hole each day. The speaker discovered that Sgr A* triggered a huge explosion about 2 million years ago, when cave people walked the Earth; this was recently confirmed by NASA’s Fermi gamma-ray satellite. The new ESO Gravity instrument tracks the motion of the closest stars to Sgr A* and detects movement every single day! One star even reaches 32,000 km/s at closest approach, 12% of the speed of light. Other stars have escaped the Sgr A* region being ejected at speeds of 2000 km/s into the Galaxy. So what does the future hold and what can we learn from these remarkable observations? We will explore these topics and some crazy ideas.

Public Star Nights

Experience the night sky through our telescopes at public viewing nights.

We have not yet added any upcoming events - please check back soon.

Members' Diary

December 2019
December 6, 2019
December 7, 2019

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Latest Issue

Inside The Bulletin

Each month the Society publishes The Bulletin - a 16 to 20 page newsletter for members, containing information on astronomical news and events.

This month's issue includes:

In this issue:

  • Photographing the Sun’s Neighbours
  • Observatories in Odd Places No 8
  • Creating the River Murray International Dark Sky Reserve
  • VicSouth Report
Read now


Membership is open to people of all ages and professions— the only pre-requisite is an interest in astronomy. It does not matter how much you know about astronomy or any other science. The Society has something for you.Our members come from all walks of life. What they share is the enjoyment the night sky has to offer.

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