The Cardiff Astronomical Society (CAS) is a thriving society located in South East Wales. It has been in existence for over 40 years and is one of the largest amateur astronomical societies in the UK. CAS continues to provide 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

CAS Privacy Policy

In the lead-up to the General Data Protection Regulation (GDPR) coming into effect on 25th May 2018 the Cardiff Astronomical Society introduced a Privacy Policy on 20th April 2018. It can be accessed by clicking on the button below and can also be found among the Important Documents contained in the Members' Area of the website.

Privacy Policy

The Policy will be kept under review in the light of experience gained and comments received from CAS members.

Upcoming CAS Events

  • Solar Observing

Saturday, 23rd June from 10.00 a.m. until 4.00 p.m. at the Brecon Beacons Mountain Visitor Centre, Libanus, LD3 8ER

Using specialist equipment and purpose-made filters join Cardiff Astronomical Society for a chance to look SAFELY at our nearest star, close to the date of the summer solstice. All life on Earth depends on it! Solar telescopes will be set up for the event, offering a safe way of observing the dynamic surface of the Sun. Cardiff AS members will be on hand for advice, making this a great introduction to astronomy.

This public event is free and family friendly, but car parking charges will apply.

  • Next Talk

Thursday, 21st June 2018 - "DustPedia - a multi-wavelength study of galaxies" - Professor Jon Davies, Cardiff University

From 7.30 p.m. till 9.30 p.m. (at the latest) at Cardiff University's School of Physics and Astronomy, Queen's Buildings, The Parade, Cardiff CF24 3AA venue for talks

  • Next Observing Session

Friday, 7th or Saturday, 8th September 2018 - please click here

See below a map of the night sky at 9.30 p.m. on 7th/8th September. Left click on it to enlarge it and it can then be printed off, if you wish!

  • Next Star Party

Friday, 7th September from 7.30 - 9.30 p.m. at Dyffryn Gardens - please click here

How you can support CAS when shopping online

If you chose to do so, every time you shop online via 'easyfundraising' at one of 3,300 retailers - see opposite - a donation will be made to the Society and it won't cost you a penny extra. It's really simple to get started but please click here for more information including an important tip.

Sign up for free with easyfundraising

Come and join some of the Society's 300-plus members at one of our talks or observing events.
We promise a warm and friendly welcome for all.
Only £15.00 per annum also means you can make use of our Library.

In Association with Amazon.co.uk