Thursday 4th July 2024 at 7.30 p.m. "Erwin Finlay-Freundlich FRSE FRAS", presented by Mike Frost, BAA

Talk summary:

Erwin Finlay Freundlich was a German astronomer. In the early years of his career he was a colleague of Albert Einstein, and was closely involved in the calculations and observations which proved Einstein's General Theory of Relativity.

He then pursued a peripatetic career in Berlin, Istanbul and Prague. As World War 2 loomed, he and his family faced a terrifying journey across Europe to escape Hitler's clutches. Freundlich ended up in Scotland, where he spent the rest of his academic career at St Andrews University.

Erwin's is a life entwined in the great movements of the twentieth century - political, social, scientific and cultural. I've worked with his family and with people who knew him at St Andrews to bring you his story.

Speaker summary:

Mike Frost has a Master's degree in astronomy from Sussex University and is a Fellow of the Royal Astronomical Society. When he left academia for a career in engineering, he realised that the history of astronomy offered an opportunity to do astronomical research research without the need for telescopes or supercomputers. Mike is director of the Historical Section of the British Astronomical Association and a founder member of the Society for the History of Astronomy. As an observer, his absolute favourite thing is solar eclipses - he's a guest astronomer for the Astro-Trails tour company, a contributor to the recently published "Eclipse and Revelation: Total Solar Eclipses in Science, History, Literature, and the Arts", and you might have seen his recent article "a very British eclipse" in the June edition of Sky at Night magazine.


Zooniverse gives people of all ages and backgrounds the chance to participate in real research with over 50 active online citizen science projects. Work with 1.6 million registered users around the world to contribute to research projects led by hundreds of researchers.

There are many projects to choose from. For Space related projects see here.

Fortnightly CAS Social (Tuesday Evening) via Zoom (Members Only)

Once a fortnight (same week as Thursday talk) on a Tuesday evening from 19:00 to around 21:00 we hold a social get together on zoom where we chat about both astronomical and non-astronomical subjects, have a quiz and have presentations by members. The presentations are usually on either member's hobbies or their travels but can be on anything they think others will find interesting.
Why not come along one week to see what you think. You do not need to stay for the whole session and people often arrive late or leave early because of other commitments. It is very informal!
To register your interest complete the ContactUsForm. Please include your Membership Number and you will be sent a link to the next session.

Federation of Astronomical Societies (FAS)

Members of Cardiff Astronomical Society are automatically also members of the FAS.

We receive an online quarterly newsletter from them. The latest copy along with previous versions can be found here

They also publish a list of events that may be of interest to some of you. They can be found here. Please note some of the events incur a charge.

Recent Public Events

Museum After Dark 14th Feb 2024

A very busy evening, we did manage to talk to many people, give them an opportunity to look through a telescope at inflatable planets, give away lots of goodies, and hopefully encouraged a number of children to pursue the interest or take up science. As usual a warm welcome from the events people at the Museum, with many thanks to them for the invitation and the hospitality.

Theresa Cooper


The night sky this month

(Courtesy of BBC Sky at Night Magazine)

Day-by-day guide to this month's night sky

- text and photos


Next Star Party - Details to be confirmed


Next Observing Session

Please see our Observing Sessions page for dates



Introduction to CAS

The Cardiff Astronomical Society (CAS) is a thriving society located in South East Wales. It has been in existence for over 45 years and is one of the largest amateur astronomical societies in the UK. CAS provides a range of facilities for both Society members and the public at large including a varied programme of talks on Thursday evenings (except in August) at the Physics and Astronomy Department of Cardiff University. In addition, regular night sky (and occasional solar) Observing Sessions are held at the Society's own Observatory at Dyffryn Gardens.

Our members come from all walks of life and their knowledge of astronomy ranges from complete beginner to advanced. You don't need any specialist knowledge to join us and neither do you need to own a telescope or binoculars. It's also possible to try us out before joining!

More details about the Society and what it does are available here

We are keen to get more Society members on board to assist with the running of CAS events - please see here how you can Help Us


Come and join some of the Society's members at one of our talks or observing events. We promise a warm and friendly welcome for all. Only £18/£3/£24 per annum for Adult/Junior/Family membership also means you can make use of our Library

Gift Aid

CAS is registered for Gift Aid. This means that, if you are a UK taxpayer, we can claim back the standard rate tax on subscriptions (and on any donations) giving an effective 25% boost to the amount the Society has received. However, in order to reclaim these monies from HMRC, we need all members who pay tax to complete and return a Charity Gift Aid Declaration form. Please note that if you have paid your subscriptions by PayPal, you will have already been asked if you would consent to those subscriptions being Gift Aided - but we still need a completed Charity Gift Aid Declaration form in order for us to reclaim the tax paid as Gift Aid.

If you are eligible, please take a form (using the button opposite) and then complete it and pass it to us at one of the fortnightly talks or send it to CAS by post or email (see the bottom of the form). Thank you for your help!

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Cardiff Astronomical Society outreach for schools, colleges, businesses & organisations.

We welcome all invitations from schools, colleges, businesses, scouts, guides and other organisations in providing outreach. We can host events our our observatory in Dyffryn Gardens, Vale of Glamorgan. We can also discuss events with your organisation to include stargazing, talks and activities. We do not charge a fee for this but would kindly request that expenses are covered as we volunteer our time.

We have a wide range of expertise & can offer events to all ages and knowledge levels.

If you would like to discuss outreach with us please use our ContactusForm and someone will contact you.

It should be noted that CAS has a formal Policy on Child Protection and the Protection of Vulnerable Adults