| Date | Time | Title | Speaker |
| 11 Dec 2025 | 19.30 | The sixty-four-trillion-mile tape measure | Dr Jane Clark of CAS & David Bennett of Bristol AS |
| 27 Nov 2025 | 19.30 | The Original Orion | Dr Nik Whitehead, University of Wales, Trinity St. David's |
| 13 Nov 2025 | 19.30 | Exoplanets and developments towards very high dynamic range images | Prof Hugh Jones, University of Hertfordshire |
| 30 Oct 2025 | 19.30 | The Second Star to the right: a History of Celestial Navigation | Philip Wallace FRAS, CAS |
| 16 Oct 2025 | 19.30 | Why Chile is the best place in the World for Astronomy | Dr Roger Wesson, Cardiff University |
| 18 Sep 2025 | 19.30 | The History of Sir Fred Hoyle | Dr Simon Mitton, Cambridge University |
| 4 Sep 2025 | 19.30 | The Chemistry of the Universe | Professor Mike Edmunds |
| 3 Jul 2025 | 19.30 | Next generation radio telescopes: Radio astronomy as a global endeavour | Dr Natasha Maddox, University of Bristol |
| 19 Jun 2025 | 19.30 | Discovering Planets and Stars around other Stars | Dr Ingrid Pelisoli & Dr Thomas Wilson — University of Warwick |
| 5 Jun 2025 | 19.30 | What's shaking Mars? An Overview of NASA's InSight Mission | Dr Anna Horleston, University of Bristol |
| 22 May 2025 | 19.30 | Three short talks | CAS members |
| 8 May 2025 | 19.30 | Why is the Sun single? | Prof Anthony Whitworth, Cardiff University |
| 10 Apr 2025 | 19.30 | Neutron stars: Nature's most Extreme Laboratories | Professor Ian Jones, University of Southampton |
| 27 Mar 2025 | 19.30 | Was Einstein 100% right? (about relativity) | Prof Malcolm MacCallum, Queen Mary, University of London |
| 13 Mar 2025 | 19.30 | Deep Space to Deep Impact | Paul Roche, Cardiff University |
| 27 Feb 2025 | 19.30 | Myths of the Sky | Martin Griffiths, Dark Skies Wales |
| 13 Feb 2025 | 19.30 | How to Kill a Galaxy: Black Holes, Noisy Neighbours, and Cosmic Car Crashes | Dr Tim Davis, Cardiff University |
| 30 Jan 2025 | 19.30 | Wales: A Sustainable Space Nation | Dr Rosie Cane |
| 16 Jan 2025 | 19.30 | What Scientists think | Prof Mike Disney |
| 2 Jan 2025 | 19.30 | Experiments in the Infrared | Dr Jane Clark, CAS |
| 12 Dec 2024 | 19.30 | Life in the Universe | Professor Matt Griffin, Cardiff University |
| 28 Nov 2024 | 19.30 | Rainbows, Haloes and Glories | Professor Alan Davies, University of Hertfordshire |
| 14 Nov 2024 | 19.30 | Exotic Stars | Dr Nicola Whitehead |
| 31 Oct 2024 | 19.30 | Vera Rubin: The life and legacy of a remarkable astronomer | Dr Jacqueline Mitton, Total Astronomy Ltd |
| 17 Oct 2024 | 19.30 | Using Galaxy Clusters to Study Dark Matter and Dark Energy | Prof Ben Maughan, University of Bristol |
| 3 Oct 2024 | 19.30 | Astronomy for a Rainy Day | Andrew Thomas |
| 19 Sep 2024 | 19.30 | Pulsars, Quasars and Binary Classifications | Hannah Waddington |
| 5 Sep 2024 | 19.30 | The Myth of the Space Race | Phill Wallace, CAS chair |
| 4 Jul 2024 | 19.30 | Erwin Finlay-Freundlich FRSE FRAS | Mike Frost, BAA |
| 20 Jun 2024 | 19.30 | Brown Dwarfs | Dr Jane Clark, CAS |
| 6 Jun 2024 | 19.30 | Space Industry in Wales | Neil Monteiro, Space Forge |
| 23 May 2024 | 19.30 | Three Short Talks | Members of CAS |
| 9 May 2024 | 19.30 | How we became aware of galaxies | Dr Jane Clark of CAS |
| 11 Apr 2024 | 19.30 | Gas Flows and the Abundance of Elements in Galaxies | Prof Mike Edmunds of Cardiff University |
| 28 Mar 2024 | 19.30 | Making atoms in explosions | Dr Jane Clark, CAS Observatory Manager |
| 14 Mar 2024 | 19.30 | Detecting Exoplanets: other worlds beyond our Solar System | Dr Annelies Mortier, Birmingham University |
| 29 Feb 2024 | 19.30 | Criminals in Astronomy | Prof Mike Disney |
| 15 Feb 2024 | 19.30 | Exploring the Invisible Cosmos Through Island Universes | Dr Jenifer Millard, Cardiff University |
| 1 Feb 2024 | 19.30 | The Solar system’s planetary frontiers: Uranus and Neptune | Dr Michael Roman, University of Leicester |
| 18 Jan 2024 | 19.30 | Galaxy Season; Why there is one and what to see | Dr Jane Clark, CAS |
| 4 Jan 2024 | 19.30 | White Dwarf Pulsars | Dr Ingrid Pelisoli, University of Warwick |
| 14 Dec 2023 | 19.30 | Mapping the Milky Way | Dr Rhys Morris, University of Bristol |
| 30 Nov 2023 | 19.30 | Tracking the Moons of the Solar System | Dr Jane Clark, Observatory Manager, Cardiff Astronomical Society |
| 16 Nov 2023 | 19.30 | The largest cosmic explosion, AT2021lwx | Dr Philip Wiseman, Southampton University |
| 2 Nov 2023 | 19.30 | The UK & Global Meteor Networks and the contribution of CAS | Edward Cooper, CAS |
| 26 Oct 2023 | 19.30 | The James Webb Space Telescope | Dr Mark Clampin, Director, Sciences and Exploration Directorate, NASA |
| 19 Oct 2023 | 19.30 | Star Warps: Neutron Stars in Gravitational Wave Astronomy | Natalie Williams, University of Birmingham |
| 5 Oct 2023 | 19.30 | Astronomy In the Classroom | Emma Wride, AstroCymru |
| 21 Sep 2023 | 19.30 | Helioseismology | Prof Yvonne Elsworth FRS FInstP FRAS |
| 7 Sep 2023 | 19.30 | Hoaxes, Myths and Conspiracy Theories and their Dangers | Phill Wallace, Chair, Cardiff Astronomical Society |
| 22 Jun 2023 | 19.30 | Lunar Flashes | Dr Tony Cook, Aberystwyth University |
| 8 Jun 2023 | 19.30 | Extreme Stellar Environments | Dr Vivien Raymond, Cardiff University |
| 25 May 2023 | 19.30 | Three Short Talks | Dr Jane Clark & Stephen Webber, CAS |
| 11 May 2023 | 19.30 | Project Orion | Phill Wallace FRAS, Cardiff Astronomical Society |
| 13 Apr 2023 | 19.30 | The Large Magellanic Cloud | Dr Jane Clark |
| 30 Mar 2023 | 19.30 | Molecules in Sunspots | Dr Maire Gorman, University of Bristol |
| 16 Mar 2023 | 19.30 | Photographing Galaxies: My Learning Journey | Dr Jane Clark |
| 2 Mar 2023 | 19.30 | How the Icy Moons of Jupiter became a goal for space exploration | Prof David Southwood, Imperial College London |
| 16 Feb 2023 | 19.30 | Urban Astrophotography | Lee Pullen |
| 2 Feb 2023 | 19.30 | Exoplanet atmospheres & imagery from the James Webb space telescope | Dr Hannah Wakeford, University of Bristol |
| 19 Jan 2023 | 19.30 | Optical Interferometry | Dr Daniel Mortimer, Exeter University |
| 5 Jan 2023 | 19.30 | Elevators into Space | Phill Wallace FRAS, BSc, Chair, Cardiff Astronomical Society |
| 22 Dec 2022 | 19.30 | The Star of Bethlehem | Martin Griffiths, Dark Skies Wales |
| 8 Dec 2022 | 19.30 | Apollo 17 & beyond | Phill Wallace FRAS & Greg Titley LLB, Cardiff Astronomical Society |
| 24 Nov 2022 | 19.30 | How the Universe will end | Professor Brad Gibson, University of Hull |
| 10 Nov 2022 | 19.30 | Cold Dark Matter. Is it cold? Is it dark? Is it matter? | Dr Julian Onions, University of Nottingham |
| 27 Oct 2022 | 19.30 | Tycho Brahe | Dr Jane Clark, Observatory Manager, Cardiff Astronomical Society |
| 13 Oct 2022 | 19.30 | The Venus Hypothesis | Dr Annabel Cartwright, Cardiff University |
| 29 Sep 2022 | 19.30 | Astrochemistry – The Cradle of Life | Prof Nigel Mason OBE, University of Kent |
| 1 Sep 2022 | 19.30 | The first images from the James Webb Telescope | Dr Rhys Morris, University of Bristol |
| 7 Jul 2022 | 19.30 | Stars: How They Live & Die | Phill Wallace FRAS, Chair, Cardiff Astronomical Society |
| 23 Jun 2022 | 19.30 | Unidentified Aerial Phenomena. Historical & Current Perspectives | Alan Foster, Cardiff Astronomical Society |
| 9 Jun 2022 | 19.30 | The Antikythera Mechanism | Prof Mike Edmunds, Cardiff University |
| 26 May 2022 | 19.30 | Noctilucent Clouds | Sandra Brantingham, Section Director, British Astronomical Association |
| 12 May 2022 | 19.30 | Three short talks | CAS members |
| 14 Apr 2022 | 19.30 | Stellar Explosions | Maxime Deckers, Trinity College Dublin, Ireland |
| 31 Mar 2022 | 19.30 | Prospero & the Black Arrow Rocket | Doug Millard, Deputy Keeper, Technologies & Engineering, The Science Museum |
| 17 Mar 2022 | 19.30 | The Cassini Mission to Saturn | Professor Carl Murray, Queen Mary University London |
| 3 Mar 2022 | 12.40 | Why are there no Green Stars? | Paul Money FRAS FBIS, Reviews Editor, BBC Sky at Night Magazine |
| 17 Feb 2022 | 19.30 | Infrared Astronomy | Dr Eric Dunford |
| 3 Feb 2022 | 19.30 | Space Law | Greg Titley, LLB, Secretary Cardiff Astronomical Society & UK Civil Service |
| 20 Jan 2022 | 19.30 | How I measured the orbit of Mars | Dr Jane Clark, CAS |
| 6 Jan 2022 | 19.30 | Astronomy in Antarctica | Professor Michael Burton, director of the Armagh Observatory & Planetarium |
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