There are two equinoxes every year. The March equinox also known as the autumnal equinox, and the September equinox or the spring...

By Monty Leventhal OAM IN SUMMARY Summing up, sunspot activity for solar cycle 25 has remained very low with Prominences & Filaments...

9th September 1892 Amalthea, a moon of Jupiter, is discovered by Edward Emerson Barnard using the 36 inch (91 cm) refractor telescope at...

Andrew Wood is an amateur astronomer and member of Sydney City Skywatchers. He has spent much of covid outside at night on Dharawal...

This month . . . Artificial Satellites. From the launch of Sputnik which lead to the start of the Space Race between the Soviet Union...

15th August 1977 The Wow! signal is received by the Big Ear radio telescope at Ohio State University. The original record, preserved by...

Garry Dalrymple, Sydney City Skywatchers historian, is an avid TROVE searcher, currently ‘mining’ the 1895 to 1930 articles from the...

The disc shaped asteroid belt is located between Mars and Jupiter at a distance ranging from 329-478 million kilometres from the Sun. ...

In March 2005 I visited Macquarie University with Dr Nick Lomb, who was then Curator of Astronomy and Sydney Observatory. In a large shed...

Presented by Dr Ian Kemp Monday 2 August 2021 6:30pm ​ This talk is about “UGSU cataclysmic variables” - one of the most interesting...