Photograph: Mike Chapman (centre) at a celebration for the BAA NSW Branch of the BAA centennial celebration in 1995. Left: Madeleine and Nick Lomb, Right Janette Brenan and Joe Kelly. Photograph courtesy Nick Lomb. This on-line library is named in memory of Michael Benedict Chapman, past president of Sydney City Skywatchers. Sydney City Skywatchers was previously called the New South Wales Branch of the British Astronomical Association (BAA NSW). Our members have, for more th

Find out about the Sun, our closest Star, from Lyn Smith FRAS.

The amount of lithium in the universe has changed since the Big Bang, can we measure the original amount?

A recap of the May 2026 meeting at Sydney Observatory.

This summary of our April astronomy meeting is a great recap of perfect for those who could not attend.

A long time ago in a galaxy not at all far away…

How to see 3 planets and the waning Moon

Find out about the chemical elements that surround the supermassive black hole in our Milky Way galaxy, how to use a solar telescope, the famous NGC6397 globular cluster and more.

In these two 20-minute presentations Grahame Kelaher will discuss his astro-photography practice and how he has followed Aurora and other phenomenon to get beautiful and meaningful images.

Reports from the 3 March total lunar eclipse seen from Sydney.