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The ASNSW holds meetings in most months, on Friday evenings nearest Full Moon. The meetings will have a guest speaker who is a professional astronomer or other qualified specialist, discussing leading-edge developments in astronomy or members may offer presentations of a varied nature (general interest or recent activities). Each year, the Annual General Meeting is held in August. The Astroimaging Section meets separately, with meeting information on the Astroimaging Meetings page. MEETINGS ARE CURRENTLY BEING HELD ONLINE USING ZOOM.

Notes to guest speakers: Our meeting hall is equipped with a data projector (VGA and HDMI connections available), loudspeakers and projection screen. In line with our Anti-Discrimination and Harassment Policy, we have to stipulate that your presentation should not include any content that may cause offence to anyone in the audience. Details of the policy are available on our website here: http://www.asnsw.com/node/963#policies

 

List of Past Speakers

Forthcoming Meetings

Friday 28 May 2021 - 7:30pm
Topic: How to find the multiple stellar populations in the Magellanic Clouds?
Speaker: Shalmalee Kapse, PhD Candidate, Macquarie University
Venue: ZOOM - Members will receive an email with the link to join the meeting
Abstract: All old globular clusters were thought to be the hosts for single stellar population, which means all the member stars of that particular cluster were assumed to be of the same age, mass, and chemical composition. This was, indeed, intuitive to think. However, recent observations of intermediate-age and old globular clusters have contradicted this assumption. Now, many young and intermediate-age clusters are also the hosts of multiples populations; clusters having a variety of ages, masses, and various chemical compositions. I will briefly talk about the simple and multiple populations residing in our neighboring galaxy, the Magellanic Clouds clusters. I will also talk about how I use the Hubble Space Telescope (HST) data to investigate various evolutionary stages of the star cluster to understand its properties.
Biography: Shalmallee is a PhD candidate at Macquarie University, Sydney working on Hubble Space Telescope data to understand the properties of the young (<1 Gyr) and intermediate-age (~ 1-3 Gyr) star clusters in our neighboring dwarf galaxies; the Magellanic Clouds. 

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Friday 25 June 2021 - 7:30pm
Topic: Space Rocks and Chaotic Orbits: & Could Earth have a hidden companion?
Speaker: Ian Kemp, ICRAR, ASNSW
Venue: ZOOM - Members will receive an email with a link to join the meeting
Abstract: Nothing could be more boring than a rock going round in orbit for millions of years, right? Well as usual, Ian begs to differ, and will take you on a quick tour of some of the features of orbits that you may not have come across before.
The elliptical orbit under the influence of gravity was solved theoretically by Isaac Newton in the 1600s, and his equations are usually used today, to calculate orbits of planets, moons, comets, near-Earth asteroids, and spacecraft. There are only two slight problems - firstly, the equations cannot actually be solved if there are more than two bodies involved (which is usually the case, e.g. Earth-Moon-Spacecraft); and secondly the equations are actually incorrect anyway because they don’t include time dilation due to velocity and gravity. The only way to understand orbits long term is to use numerical modelling with a supercomputer.
In this talk we will quickly run through some of the consequences of the 'three body problem' and the limitations of Newton’s model of gravity. We’ll discuss orbit swaps, drastic variations in Earth’s orbit round the Sun, and the underlying chaotic nature of orbits in general. There are a number of ways in which objects can share an orbit, which opens up an interesting question ... could the Earth have a companion following us around the Sun? If so, how could it get there? And, if not, why not? Ian will outline some original research into whether there might be something very interesting lurking at one of the Earth-Sun Lagrange points.
As a finale we will look at orbits in the framework of general relativity - what would it be like to orbit a black hole? And it’s time to get real about GPS satellites.
Biography: Ian Kemp started his professional life in academic research - with a degree, PhD and postdoc in Materials Science. He then went off to work in Industry and government for a while (25 years) before getting back to research and obtaining a Masters degree in Astronomy. He currently works as a research scientist at the International Centre for Radio Astronomy Research (ICRAR) in Perth - working partly on ‘big data’ (i.e., extremely big, massive data) and partly on astrophysics research. https://www.icrar.org/people/ikemp/

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Friday 23 July 2021 - 7:30pm
Topic: tba
Speaker: Associate Professor Charles Lineweaver, College of Science, ANU
Venue: Zoom
Abstract: tba
Biography: tba

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Friday 13 August 2021 - 7:30pm
Topic: Annual General Meeting
Venue: tba
Abstract: Presentation of annual reports and awards and election of new committee.

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Friday 20 August 2021 - 7:30pm
Topic: Formation of stars and galaxies/physics of the interstellar medium
Speaker: Professor Mark Krumholz, Reasearch School of Astronomy & Astrohysics, ANU
Venue: Zoom
Abstract: tba
Biography: tba

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Friday 17 September 2021 - 7:30pm
Topic: Space Debris/Adaptive Optics Instruments
Speaker: Dr Doris Grosse, Research Fellow, College of Science, ANU
Venue: Zoom
Abstract: tba
Biography: tba

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Friday 22 October 2021 - 7:30pm
Topic: Lasers/Adaptive Optics
Speaker: Dr Noelia Martinez Rey, PhD Astrophysics, College of Science, ANU
Venue: Zoom or in person (TBA)
Abstract: tba
Biography: tba

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Friday 19 November 2021 - 7:30pm
Topic: tba
Speaker: tba
Venue: tba
Abstract: tba
Biography: tba

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