Our active Sun! July 2024
Sydney City Skywatchers member Garry Dalrymple has been observing sunspot activity lately with a small aperture telescope fitted with a...
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Toner Stevenson
- Mar 7
- 5 min
Women who measured stars for the Great Star Catalogue: Margaret Colville and Winsome Bellamy
Dr Toner Stevenson, History Affiliate, School of Humanities, The University of Sydney This blog post is to recognise Margaret Colville...
Elizabeth Cocking
- Feb 5
- 3 min
Astronomical happenings in February
20 February 1962 John Glenn becomes the first American to orbit the Earth in his Friendship 7 spacecraft circling it three times. The...
Elizabeth Cocking
- Dec 31, 2023
- 3 min
Astronomical happenings in January
Happy New Year! Elizabeth Cocking continues this astronomical blog post sequence in 2024. Each month she looks back on astronomical...
Elizabeth Cocking and Toner Stevenson
- Nov 30, 2023
- 3 min
Astronomical happenings in December
IN THIS MONTH 23 December 1672 Italian astronomer Giovanni Domenico Cassini observes Rhea, one of Saturn's Moons. Cassini discovered four...
Elizabeth Cocking
- Oct 31, 2023
- 4 min
Astronomical happenings in November
11th November 1572 Supernova SN1572, also called B Cassiopeiae, is first observed by Danish astronomer, Tycho Brahe. The “new star” was...
Elizabeth Cocking
- Sep 30, 2023
- 4 min
Astronomical happenings in October
24th October 1851 William Lassell finds not one, but two moons of Uranus on the same night when he discovers Umbriel and Ariel. There is...
Elizabeth Cocking
- Aug 31, 2023
- 4 min
Astronomical happenings in this month: September
17th September 1789 Mimas, the smallest and innermost of Saturn's major moons, is discovered by English astronomer William Herschel...
Elizabeth Cocking
- Jul 31, 2023
- 4 min
Astronomical anniversaries in the month of August
10th August 1675 The foundation stone for the Royal Greenwich Observatory (RGO) is laid by the first Astronomer Royal, John Flamsteed. ...
Elizabeth Cocking
- Jun 30, 2023
- 4 min
Astronomical anniversaries in the month of July
Fascinating anniversaries selected by Elizabeth Cocking. 6th July 1938 Lysithea, a moon of Jupiter, is discovered by Seth Barnes...
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