At Earth Hour in 2016 the Sydney Outdoor Lighting Society will demonstrate good lighting practice.
Regular solar observer & correspondent Harry Roberts reports on the Tau Canis Majoris star cluster.
Crowd goes wild in darkness!
Preparations for the solar eclipse in Indonesia tomorrow.
A total solar eclipse is one of the most memorable and spectacular natural events you can ever experience.
Observations has been running on this site for nearly 10 years now. Time to get ready for its birthday.