Astronomy videos
See below for my astronomy videos that I have created over the last 2-3 years. Episode 1 - Comets Episode 2 - Black Holes Episode 3 -...
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Skywatchers Blog posts
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Jeff Portelli
Aug 232 min read
Vale Les Dalrymple (1962 - 2024)
By Jeff Portelli Les Dalrymple was passionate about astronomy, and an exceptionally knowledgeable and experienced amateur astronomer. He...
Toner Stevenson
Jul 181 min read
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...
Garry Dalrymple
Mar 313 min read
How Good is your Night Sky?
An easy-to-use walk around guide. By Garry P. Dalrymple The visibility of the stars and the planets is a restriction placed on all of us...
Toner Stevenson
Mar 75 min read
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 72 min read
Did you know? Binary Stars
The dictionary defines binary as “composed of or involving two things”, so a binary star is a system composed of two stars which orbit ...
Elizabeth Cocking
Oct 31, 20234 min read
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
Jun 12, 20231 min read
Did you know? Orion's Belt
Located in the constellation of Orion the Hunter, his belt is unmistakeable in the night sky. Orion’s belt consists of three evenly...
Elizabeth Cocking
May 28, 20234 min read
Astronomical anniversaries in the month of June
25th June 1997 A Russian uncrewed cargo spacecraft collides with the Mir Space Station during a docking attempt knocking out much of its...
Elizabeth Cocking
Apr 30, 20233 min read
Astronomical anniversaries in the month of May
15th May 1618 Johannes Kepler discovers the mathematical rule governing the orbits of our solar system’s planets. The image left is...
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