Monday 1 August, 6:30pm Join in to hear from Sydney City Skywatcher members as they present fascinating insights into many aspects of...

1st July 2013 Hippocamp, a moon of Neptune, is discovered. With a diameter of approximately 35 kilometres it is the smallest moon that...

Historical astronomical events, and people who were born this month and have influenced our understanding of the cosmos. 18th May 1991...

24th April 1957 The first edition of The Sky at Night a monthly documentary television programme on astronomy is shown on British...

5th March 1616 On this day in 1616 the Roman Catholic Church adds "" (On the Revolutions of the Heavenly Spheres) by Nicolaus...

Astronomical happenings from the past and the birthdays of astronomers past and present. 19th February 1787 The first observation is...

7th November 1631 A transit of Mercury occurs. Many astronomers set up to capture Mercury's movement in front of the Sun. However only...

10th October 1846 Triton, the largest natural satellite of Neptune, is discovered by English astronomer William Lassell. The image of...

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

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