Sydney City Skywatcher members are treated to a special tour of Sydney Observatory. The Observatory has a long history in astronomy and...

The dictionary defines binary as “composed of or involving two things”, so a binary star is a system composed of two stars which orbit ...

20 February 1962 John Glenn becomes the first American to orbit the Earth in his Friendship 7 spacecraft circling it three times. The...

Date and time: 9am Sunday 11 February Departing from: Rodney Reserve, Dover Heights, NSW End of tour: Watson's Bay Hotel at approx. 11am....

Featuring images of Uranus from the James Webb telescope, Sirius B and many more highlights to kick-off 2024. You can download the issue...

'From Madsen to Beames: Reflections on Sydney Amateur Astronomy 1885–1960 and some ‘Large Telescopes’ presented by Professor Wayne...

Happy New Year! Elizabeth Cocking continues this astronomical blog post sequence in 2024. Each month she looks back on astronomical...

This month . . . . Saturn’s rings. One of the most majestic sights in the night sky. Saturn’s rings are enormous, but they are also...

IN THIS MONTH 23 December 1672 Italian astronomer Giovanni Domenico Cassini observes Rhea, one of Saturn's Moons. Cassini discovered four...

This Month …. The Astronomical Unit or AU. Used for measuring distances within our Solar System. The Astronomical Unit (AU) is an...