

The Supermassive Podcast
The Royal Astronomical Society
The UK's #1 space podcast.Science journalist Izzie Clarke and astrophysicist Dr Becky Smethurst whizz through the universe to explore the latest research with leading experts, dive to history from the society’s archives and take on your weird and wonderful questions about all things space. Can we gravitationally hitch-hike out of the solar system? Do we live in a multiverse? What is time? Plus Dr Robert Massey is on hand with his top star-gazing tips.Want to support the show? Join The Supermassive Club for exclusive content, star-gazing forums and ad-free listening... supermassive.supportingcast.fmAnd keep adding to The Supermassive Mailbox with your pictures and questions for the team. Send them to podcast@ras.ac.uk or follow them on Instagram, @SupermassivePod.The Supermassive Podcast is a Boffin Media production for the Royal Astronomical Society. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.
Episodes
Mentioned books

Sep 9, 2025 • 14min
BONUS - Are we Living in a Black Hole?
What would happen if the supermassive black hole at the centre of our galaxy disappeared? Dr Becky is back to tackle your toughest of black hole questions. Alongside science journalist Izzie Clarke and Dr Robert Massey, the team also discuss what the night sky would look like in an elliptical galaxy…and are we living inside a black hole? Join The Supermassive Club for ad-free listening and share your questions, images and more. Or email them to podcast@ras.ac.uk or on Instagram @SupermassivePod.The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Aug 26, 2025 • 47min
Supermassive Q and A...Live!
We are live at the National Astronomy Meeting in Durham with questions on everything from white holes and fuzzy stars, to solar storms and time travel. Science journalist Izzie Clarke is joined by Dr Ziri Younsi – part of the team that took the first picture of a black hole. Also on the panel, Jim Wild, Professor of Space Physics at Lancaster University and president-elect of the Royal Astronomical Society…and the one and only Dr Robert Massey, Deputy Director of the Royal Astronomical Society. Join The Supermassive Club for ad-free listening and share your questions, images and more. Or email them to podcast@ras.ac.uk or on Instagram @SupermassivePod.The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Aug 12, 2025 • 19min
BONUS - What Shape is Space?
Izzie Clarke is joined by Dr Robert Massey to tackle your questions on the shape of space, measuring gravitational waves and planet spotting. We also have another - another! - astronaut: Producer Richard chats to British ESA astronaut Rosemary Coogan about her background as an astrophysicist. Join The Supermassive Club for ad-free listening and share your questions, images and more. Or email them to podcast@ras.ac.uk or on Instagram @SupermassivePod.The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Jul 29, 2025 • 50min
Astronauts. Do we need them?
It’s a brave question to put to three astronauts live on stage but it’s a risk we are prepared to take. Recorded in front of a live audience at the UK Space Conference in Manchester, European Space Agency astronauts Tim Peake, Meganne Christian and John McFall discuss the future of human space exploration. Could robots or AI take their place? Will a trip to the Moon be as common as flying across the Atlantic? And can humans be trusted to not mess with Mars? Host Izzie Clarke asks the big questions, producer Richard Hollingham threatens the audience, and (soft sceptic) Dr Robert Massey is prepared to be unpopular as they contemplate the role of astronauts in the 21st century. Join The Supermassive Club for ad-free listening and share your questions, images and more. Or email them to podcast@ras.ac.uk or on Instagram @SupermassivePod. The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Jul 19, 2025 • 13min
BONUS - Where are Earth's rings?
What would happen if asteroid Bennu impacted Earth? Can we timelapse Saturn's rings developing? Where are Earth's rings? Plus the solar wind on Mars... The Supermassive team answer YOUR questions. Keep sending questions to podcast@ras.ac.uk, on Instagram @SupermassivePod or join The Supermassive Club for ad-free listening and to support the show. Hosted on Acast. See acast.com/privacy for more information.

Jun 30, 2025 • 51min
Why isn't Pluto a planet?
Izzie and Dr Becky decided that little ol’ Pluto doesn’t get much attention anymore. So we’re giving the dwarf planet some time in the spotlight. Why isn't Pluto a planet? How small is it? And what makes it so unique?Thank you to Prof Alan Fitzsimmons from Queens University of Belfast joining us episode.Join The Supermassive Club for ad-free listening and share you questions, images and more. Or email them to podcast@ras.ac.uk or on Instagram @SupermassivePod.The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Jun 11, 2025 • 18min
BONUS - Why aren’t stars closer together?
What would happen if planets collided at a snail's pace? How much of Avengers Endgame regarding time is scientifically acceptable? Why aren't stars closer together? And the team discuss a listener's theory to terra-form Mars.Want to support the show? Join The Supermassive Club for exclusive content, star-gazing forums and ad-free listening... supermassive.supportingcast.fmAnd keep adding to The Supermassive Mailbox with your pictures and questions for the team. Send them to podcast@ras.ac.uk or follow them on Instagram, @SupermassivePod.The Supermassive Podcast is a Boffin Media production for the Royal Astronomical Society. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

May 28, 2025 • 57min
Is Time Real?
Start your stopwatches, set your timers, turn back your clocks because Izzie and Dr Becky are talking time. What is it? How, and why, do we measure it? And is time real or a human construct?!Izzie speaks with Anne Curtis at the National Physical Laboratory who works on one of the world’s most accurate clocks, and editor Richard has been to the very heart of time itself in Greenwich with Finn Burridge at the Royal Observatory.The Supermassive Club is finally here. Join to support the show and for ad-free listening: https://supermassive.supportingcast.fm/The Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

May 13, 2025 • 16min
BONUS - Mole People on Mars
Should astronauts live underground on the Moon or Mars? Black hole jets, rogue planets, the big crunch (or freeze) and the Ontario question. Dr Becky, Izzie and Dr Robert Massey tackle your correspondence from the Supermassive mailbox and producer Richard makes a pronunciation intervention.The book Becky mentions is Red Rising by Pierce Brown. Keep sending in your wonderful ponderings. Email them to podcast@ras.ac.uk or via Instagram @SupermassivepodThe Supermassive Podcast is a Boffin Media production. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.

Apr 24, 2025 • 54min
What is Gravity?
This episode is a weighty one. Some might say massive. It’s all about gravity. What is it? Why does it matter? Izzie and Dr Becky explore Einstein and Newton’s different ideas on the subject, plus Izzie visits the Royal Society to see Isaac Newton's original manuscript for his works on gravity and the laws of motion.Special thank you to listener Hanna_m_e for suggesting this episode topic and to Professor Tessa Baker, at the Institute of Cosmology and Gravitation at the University of Portsmouth, and to Keith Moore, head of collections at the Royal Society for appearing on the show.See THAT coffee table here: https://youtu.be/5XlTkGEO564?si=9Z8KwTqOPk-Sf0xMIf you have a question for the team, or an episode suggestion, send them to podcast@ras.ac.uk or find us on Instagram, @SupermassivePod.The Supermassive Podcast is a Boffin Media production in partnership with the Royal Astronomical Society. The producers are Izzie Clarke and Richard Hollingham. Hosted on Acast. See acast.com/privacy for more information.