PODCAST · science
The Supermassive Podcast
by 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.fm And keep adding to The Supermassive Mailbox with your pictures and questions for the team. Send them to [email protected] or follow them on Instagram, <a href="https://www.instagram.co
Episodes
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Antimatter is Bananas!
In yet another mind-bending episode, we take on antimatter – What is it? How do you make it? And can you use it to power a spaceship? Dr Becky, Izzie and Dr Robert Massey (he’s back!) are joined by Professor Jeffrey Hangst from CERN in Switzerland, home of an antimatter factory. We also discover...
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More space vampires and tea in orbit
The bonus Q and A that tackles some of the biggest questions in cosmology including: How many space vampires would you need to explain dark matter? and can you make a decent cup of tea on a space station? Dr Becky, Izzie and producer Richard also tackle questions on neutrinos, Lagrange points and...
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The Kuiper Belt...Revisited
Yes, it’s a welcome return for the giant doughnut at the edge of the solar system filled with lumpy space potatoes. Dr Becky and Izzie are joined by Meg Schwamb from Queen’s University to discuss all things Kuiper Belt, the New Horizons mission, Rubin telescope and mysterious planet 9. For…
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Colanders and is space a stew?
How many colanders can you fit in a field? In, yet another, bonus episode Izzie Clarke, @DrBecky and producer Richard Hollingham share their experiences of the eclipse. Plus is space a stew? Pocket universes, and how fit do you have to be to be an astronaut? For ad-free listening, join The...
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Top Tips To See The Eclipse
There's an eclipse on Wednesday 12th August 2026. So where can you see it? And how do you do that safely? Izzie Clarke, Dr Becky Smethurst and Dr Robert Massey from have it covered. Plus, The Supermassive Book Club makes a return for your summer reading. We're (finally) on Youtube, watch us here....
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Q&A: Could Dark Matter Be Space Vampires?
It's Q&A time! Izzie Clarke, Dr Becky Smethurst and the Royal Astronomical Society's Dr Robert Massey dive into The Supermassive Mailbox to answer your brilliant and ridiculous questions. 🌑 Do meteors hit the Moon during showers? ⏳ Could black holes create different 'eras' of time? ☄️ Where did...
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Can Time Travel be sped up? What is the Bootes Void? And G'day to Australians
What is the Bootes Void? Why do we only see one side of the Moon? Can time travel be sped up? And what's the smallest amount of visible space debris? The Supermassive Podcast team answer your questions... And work on their Australian accents!? For the first time ever, you can now watch this…
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What the heck are neutrinos?
Is this the toughest subject we’ve ever tackled? Izzie certainly thinks so and it’s even making Dr Becky and Dr Robert's brains hurt. Helping them to make sense of these ‘weird and interesting’ particles are Dr Kirsty Duffy at the University of Oxford and Director of the Paris Astrophysics...
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Why Is There Motion in the Universe?
What happens if two diamond core stars collide? Will the Moon drift away from Earth? Why is there motion in the universe? And why we need a space AND time machine. Izzie, Dr Becky and Robert dive into The Supermassive Mailbox to answer your questions. For ad-free listening and to view Izzie's...
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How Do Space Telescopes Work?
Nancy Grace Roman. Ariel. The next generation of space telescopes are here. Astrophysicist Dr Becky Smethurst and science journalist Izzie Clarke explore how they work, what they can tell us and why they might unravel our current understanding of the universe. Plus Dr Robert has your stargazing...
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Did Gravity Wipe Out The Dinosaurs?
How do we calculate a black hole's event horizon? Does Mercury's tail impact Earth? Can we name a planet Rupert? And did gravity wipe out the dinosaurs? Izzie Clarke & Dr Becky Smethurst dive into the rather whimsical Supermassive Mailbox to answer your questions. Want to name an Exoworld? Here's...
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Into the Space Debris Swamp
Izzie & Dr Becky think that space needs a spring clean, so this episode is all about space debris. What is it? How big of a problem is it? And what is being done to remove it? With thanks to PhD student Megan Perks from the University of Southampton, who studies how safe all these new satellite...
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Our Artemis II Debrief
What. A. Mission. The Supermassive Team are in AWE of the Artemis II Crew and the people that helped them to loop around the Moon. From scientific aims to societal impact, Izzie Clarke, Richard Hollingham and Dr Robert Massey reflect on this latest step to returning to the Moon and their...
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When Space Goes Rogue....
The Supermassive Team are going rogue (more so that usual!) This time, it’s all about the non-conforming objects in space. Black holes, planets and the other rogue objects Izzie and Dr Becky can think of... Plus, Dr Robert Massey takes on your questions and shares his stargazing tips for April. A...
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Black holes in the lab and meeting Ryan Gosling
It’s a massive bonus episode this month with both listener questions and an extended interview with the producer/directors of the new Ryan Gosling film: Project Hail Mary. Dr Becky and Dr Robert are joined by editor Richard to tackle questions on creating a black hole in the lab, how long a…
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What is the Hubble Tension?
There's a crisis in cosmology when it comes to understanding a little thing like the acceleration of our universe, aka The Hubble Tension. And in this episode, Izzie Clarke and Dr Becky Smethurst are digging into what this is and (trying to) explain the science behind it. A huge thank you to our...
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2026: The year in space... And at sea?!
What are the biggest space missions of 2026? And what are the best stargazing opportunities this year? The Supermassive Team - Izzie Clarke, Dr Becky Smethurst, Dr Robert Massey and Richard Hollingham - share their astronomical excitement for the year ahead and ponder if they should charter a…
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Q&A: Meteors, Artemis II, and Space Bathtubs
The Supermassive Podcast is back for 2026, and we've got a MEGA Q&A. What happens when two nebulae collide? Where did Neptune and Uranus form? What’s the procedure for a medical emergency on the ISS? And more. Plus, Izzie, Dr Becky, Robert and Richard cover everything you need to know ahead of…
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How to Time Travel
Fire up your flux capacitor and dematerialise your Tardis because The Supermassive Podcast is traveling in time. Is it possible? How does it work? And, crucially, which films got the physics right (or wrong!)? Thank you to Dr Emma Osborne from the University of York, and Dr Alfredo Carpinetti…
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Slingshots, Christmas Presents & Alien Communication
What would it be like to feel gravitational waves? How are satellites protected from extreme solar storms? How do gravity slingshots work? Are aliens potentially communicating outside of the electromagnetic spectrum? Plus Izzie, Dr Becky and Robert share their annual Christmas present...
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Protecting Our Dark Skies
What are the threats to our dark night skies? And what needs to be done to protect them? Izzie, Dr Becky and Robert explore this important topic and head outside (...and the weather was not on their side!) Thank you to Dr Samantha Lawler at the University of Regina in Saskatchewan and Andy...
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Supermassive Gone Rogue
Can JWST detect exomoons? How can black holes keep absorbing more mass? How big is our cosmic neighbourhood? And what is a rogue black hole?! Izzie, Dr Becky and Robert answer YOUR questions. You can add to The Supermassive Mailbox by emailing [email protected] or messaging us on instagram...
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A Watery History of Mars
Grab your space swimsuit, Izzie and Dr Becky explore Mars' wet past. When did the red planet have water? Where did it go? And were there canals on Mars? Thank you to Joe McNeil from the Natural History Museum and Sian Prosser from the Royal Astronomical Society. If you like this topic, you might...
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Mercury, Gemini and Pringles
It’s space book club time, featuring the latest book by author and photography expert Andy Saunders: Gemini and Mercury Remastered. Producer Richard enthuses about these mid-60s missions and we talk to the author. Meanwhile, Dr Becky, Izzie and Dr Robert also discuss Project Hail Mary by Andy…
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Don't Panic…but a solar storm could be a disaster
It's been 166 years since scientists recorded the world's most powerful solar explosion. Izzie, Dr Becky and Dr Robert Massey are big fans of anniversaries, so they investigate how the Carrington Event affected the Earth - and why something similar today could be devastating. Thanks to Kate Bond...
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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...
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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…
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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.…
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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...
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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 [email protected], on Instagram @SupermassivePod or join The Supermassive...
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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...
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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...
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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...
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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...
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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…
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BONUS - Can we gravitationally "hitch hike" out of the Solar System?
What the bloomin’ hell is a Gravastar? Are fast radio bursts like solar flares on steroids? Plus an interesting question on multiverses that can't be summed up in a short sentence. Izzie Clarke, Dr Becky Smethurst and Dr Robert Massey dive into The Supermassive Mailbox and take on your questions....
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Returning to the Moon - with ESA Astronaut Matthias Maurer
Climb aboard The Supermassive Rocket, Izzie and Becky are (talking about) sending humans back to the moon. Joining them on their trip is European Space Agency astronaut Matthias Maurer and Jacki Mahaffey, the Chief Training Officer for NASA’s Artemis II mission. Plus, Dr Robert Massey, the Deputy...
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BONUS - Can A Star Orbit Another Star?
If black holes are so dense, how can gamma rays jet shoot out from it? At what point in space does our sun become invisible to the naked eye? And a question about CubeSats, black holes and detecting alien civilisations... It time for Izzie Clarke, Dr Becky Smethurst and Dr Robert Massey to take…
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Sample Return Missions - What Could Possibly Go Wrong?
This time Dr Becky Smethurst and Izzie Clarke discover why it’s touch and go when it comes to returning asteroid samples to Earth and hear how we’ve been exchanging spit with Mars since the dawn of the Solar System. The team is joined by Dr Sara Russell, a meteorite researcher at the Natural...
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EMERGENCY BONUS - Asteroid 2024 YR4
Scientists have detected an asteroid that has a small chance of hitting Earth. Resident expert Dr Robert Massey tells Izzie Clarke and Richard Hollingham why we shouldn't be worried. Want to suggest a topic to the team? Contact [email protected] or find us on Instagram @SupermassivePod. The...
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BONUS - Could we capture a primordial black hole?
What are the implications on space exploration with a change of president? Did cosmic inflation come before the Big Bang? Are there sonic booms in space? Izzie, Becky and Robert take on your questions! Keep sending your questions to [email protected] or find us on instagram @SupermassivePod.…
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The Search for Space Aliens
Hosts Izzie Clarke and Dr Becky Smethurst are starting 2025 with a biggie. The scientific search for extraterrestrial life: Where are scientists looking? How do they search for potential signals? And what the heck is the plan if they find one?! The Supermassive team hears from Seth Shostak from…
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Q&A - Space Potatoes and Christmas Stars
Our final episode of 2024 is a SUPERMASSIVE Q&A. Izzie Clarke, Dr Becky Smethurst and Dr Robert Massey make their way through your questions. What’s the farthest star we can see with the naked eye? Why do black holes expand and shrink? And what would happen if we accelerated an uncompressed…
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BONUS - Why can't anything go faster than the speed of light?
From planetary alignment through the galaxy to spacetime expansion, The Supermassive Team answer your questions. Keep sending us your questions, email us on [email protected] or find us on instagram @SupermassivePod Hosted on Acast. See acast.com/privacy for more information.
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The Mystery of Fast Radio Bursts
The Supermassive Team are investigating strange blasts of energy in space called Fast Radio Bursts. What are they and where do they come from? Dr Stuart Ryder from Macquarie University in Australia joins Izzie, Dr Becky and Robert to help explain. Christmas Present Ideas Astronaut Chris…
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BONUS - Nuclear Pasta & G-Astronomy
... Potentially the silliest bonus episode we've ever recorded. The Supermassive Team takes on your questions; What are Brown Dwarfs? How can photons have different energies? Do frozen stars exist? And they get extremely distracted by the concept of nuclear pasta. Even Producer Richard gets...
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Strange Stars and Bizarre Binaries
From pulsating stars to those with diamond cores, Izzie and Dr Becky are exploring weird and wonderful stars. What are the different types of stars in our universe? And what are the oddballs? Plus Dr Robert Massey is here for your top stargazing tips. With thanks to Professor Andrew Norton from…
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BONUS - A Bumper Edition
Auroras, and comets, and launches... Oh my! Izzie Clarke, Dr Becky Smethurst, and Dr Robert Massey run through a MEGA month for the astronomy community. Plus, there's just enough time to squeeze in a few listener questions. Here's our recommendations on news or journals sites to keep up with all...
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Untangling the Cosmic Web
Izzie and Dr Becky are untangling the cosmic web - the large scale structure of the universe - with help from Dr Chiara Mingarelli from Yale University. What the heck is it? What do we know about it? And can we use gravitational waves to "see" it? Plus, Dr Robert Massey is on hand to answer your...
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BONUS - What distorts time?
What happens when a black hole and gravitational wave collide? How will the moon's gravity impact tides with rising sea levels? And "the Supermassive Wise Ones" discuss Einstein vs Newton in this bonus episode. Send your questions to [email protected]. Hosted on Acast. See acast.com/privacy for...
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ABOUT THIS SHOW
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.fm
And keep adding to The Supermassive Mailbox with your pictures and questions for the team. Send them to [email protected] or follow them on Instagram, <a href="https://www.instagram.co
HOSTED BY
The Royal Astronomical Society
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Frequently Asked Questions
How many episodes does The Supermassive Podcast have?
The Supermassive Podcast currently has 124 episodes available on PodParley. New episodes are automatically indexed when they're published to the podcast feed.
What is The Supermassive Podcast about?
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...
How often does The Supermassive Podcast release new episodes?
The Supermassive Podcast publishes regularly with 124 episodes available. Check the episode list for the typical release schedule.
Where can I listen to The Supermassive Podcast?
You can listen to The Supermassive Podcast on PodParley by clicking any episode. We provide an embedded audio player for direct listening, and you can also subscribe via your preferred podcast app using the RSS feed.
Who hosts The Supermassive Podcast?
The Supermassive Podcast is created and hosted by The Royal Astronomical Society.
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