Contact Us

Sydney, NSW, Australia

You are the visitor number:

Recent Posts

Articles by Members

December 31, 2019

7 January 1610

Galileo discovers four moons orbiting the planet Jupiter. Looking at what he thought were a group of stars, he noted the objects appeared to move in a regular pattern and realised they were in orbit around Jupiter. Today, Jupiter’s four largest satellites—Io, Europa, Ganymede, and Callisto—are named the G...

November 1, 2019

27th November 1783

The first reference to black holes is mentioned by John Michell, an English natural philosopher, in a paper for the Philosophical Transactions of the Royal Society of London. He called them "dark stars". Michell suggested that there might be many "dark stars" in the universe, and today astronomers bel...

August 31, 2019

26th September 1905

Einstein’s Theory of Special Relativity is published. It is the generally accepted and experimentally confirmed physical theory regarding the relationship between space and time and contains one of the most famous equations, e=mc2, which in simple terms means if you multiply a specific amount of mass...

March 2, 2019

25th March 1655

Titan, Saturn’s largest moon was discovered by Dutch astronomer Christiaan Huygens. Titan is considered the most Earth-like moon discovered so far and is the second largest moon in the solar system. The image above is through an infrared filter by Cassini, Credit: NASA/JPL/University of Arizona/Universit...

January 31, 2019

13 February 1633

Italian astronomer Galileo Galilei arrived in Rome to face charges of heresy for advocating the Copernican theory, which stated that the Earth revolves around the Sun. Galileo officially faced the Roman Inquisition in April of that same year and agreed to plead guilty in exchange for a lighter sentence....

December 31, 2018

Happy New Year! 

24th January 1986

Voyager 2 encounters Uranus. At its closest the spacecraft came to within 81,500 kilometres of Uranus's cloud tops. As at November 2018 NASA announced that the space probe had crossed the outer edge of the solar system and is now more than 18 billion kilometres from Earth.

31st January 1...

December 2, 2018

6th December 1882

The Transit of Venus, the second and last transit of Venus of the 19th century, the first having taken place eight years earlier in 1874. Sydney Observatory ployed an important part and the NSW Government astronomer, H.C. Russell co-ordinated observations from different sites in NSW including Woodford...

October 31, 2018

28 November 1967

The first pulsar is discovered by Jocelyn Bell (Image above taken 19 July 2018). Working as a research student at Cambridge University she discovered a signal that was pulsing with great regularity. She dubbed it "Little Green Man 1". The discovery was recognised in 1974 with the Nobel Prize in Physics...

September 30, 2018

12 October 1915

Scottish born astronomer Robert Innes announced the discovery of the nearest star to our Sun, Proxima Centauri at a distance of approximately 4.24 light years from Earth. It is one of three known stars in the Alpha Centuri system in the constellation of Centaurus. The other two stars being Alpha Centauri...

August 31, 2018

Its all about astronomy - 'In this month' blog posts feature significant events which happened and people born during the month who influenced how we understand our planet and its place in space. September features Neptune, the Van Allen belt and the Australian Compact Array at Narrabri.

Please reload

March 31, 2020

February 3, 2020

Please reload