Explore every episode of the podcast AstrotalkUK

Every national space programme rests on four pillars: visionary leadership, unwavering political and economic commitment, realistic ambitions, and a deep acknowledgement that fundamental science is the essential bedrock for a successful and enduring space programme. Professor Wu, Ji has continued that tradition of putting science first. In this interview, recorded during COSPAR2026 in Florence. He talks about his priorities of science, international collaboration and the profound significance of adherence to "Systems Engineering".

Just between you and me, one of the best parts of this podcast is the opportunity it gives me to meet some very unique and special people, like today's guest, Dame Jocelyn Bell-Burnell. Last summer I met and recorded this interview in Oxford. We covered a range of topics, including Pulsars (of course), women in science, her many awards and her faith. As part of her PhD in Cambridge in the late 1960s, she helped build an instrument called the Interplanetary Scintillation Array. In the interview, we discussed many topics, including Discovery of pulsars Dealing journalists Women in physics Special Breakthrough Prize in 2018 Faith and status of science in society

The European Solar Telescope is a project to build ever laregr telescope on Earth but this time for a solar telescope. This interview was recorded in Tenerife but the EST will be built on the negighboring Island of Las Palmas.

The Toliman Space Telescope. A small, novel spacecraft looking for Earth-like planets in our nearest neighbour star system, Alpha Centauri.

Imagine a giant vertical railway stretching 100,000 km from the equator, somewhere in the Pacific, straight up into space. Instead of expensive, polluting rockets, the space elevator offers a smooth, slow electric ascent to Earth orbit. This "bridge to the stars" connects a floating Earth platform at 36,000 km to a massive counterweight located 64,000 km farther out. It is held taut by the Earth's rotation.

We are increasingly aware of the impact of space weather on spacecraft in space and, occasionally, on electrical power transmission on Earth, but what about its impact on the Earth's atmosphere? That is exactly the research interest of Professor Pallam Raju, Dean of the Physical Research Laboratory in Ahmedabad, India. Founded in 1947, the PRL is one of India's most prestigious scientific institutions, not least because it was founded by Dr Vikram Sarabhai.

Space Power Ltd, founded in 2019, is developing a novel solution for contactless power delivery using high-intensity lasers to extend the lifespans of ageing satellites in space. I spoke with its founder, Keval Dattani, in Nicosia during Cospar2025.org.

Professor Kai-Uwe Schrogl is a space law expert with experience in many roles, including working with the European Space Agency ESA, the German Federal Ministry for Economic Affairs and as the Director of the European Space Policy Institute (ESPI) in Vienna. In this interview, recorded in Nicosia during cospar2025.org in November 2025, he discusses concerns about increasing commercialisation of space and the lunar surface—specifically, the absence of a universally accepted framework for lunar governance.

Cyprus is a small country with a small population and a small economy. But it has big ambitions in space. In this episode, recorded at Cospar 2025 in Nicosia, George Danos, who has been championing this case for Cyprus for years and can be considered Cyprus's Carl Sagan, explains the rise of Cyprus's space activities in communication services, small satellites, and collaboration with ESA and more.

From centruries of weaving in the state of Kerala in India to automated AI controlled machines weaving Graphene coated fibres in Manchester. A modern day Cottonopolis.

rofessor James Baker, CEO of Graphene@Manchester, describes Manchester’s journey to commercialise the Nobel Prize-winning discovery of Graphene.

You may have seen the BBC documentary Britain's Greatest Pilot. Yes, he was an outstanding pilot, but there was much more to him than just that. I published extracts from an interview with Captain Eric Brown in April 2011. Much of that interview was not published .. until now.

Just as the Moon was the first stepping stone for our interplanetary exploration, our nearest star, the Alpha Centauri System will inevitably become our stepping stone for our Interstellar Journey. That is in the distance. A new mission, The Toliman Space Telescope, is launching soon will target the Alpha-Centauri System from Earth orbit.

It is December 2034. A spacecraft launched from Earth in July 2028, enters Titan's atmosphere at 5km/s. Around 2 hours later, it softly lands on the surface at less than 1m /s. Over the next three years, NASA's Dragonfly mission, a rotorcraft the size of a small car, will chemically analyse the Titan's atmosphere, ground and a little of its subsurface. It's called Dragonfly

A two-day Breakthrough Discuss conference held on 23rd and 24th April 2025 in Oxford England, took stock of the latest developments through three main sessions: "Forms of Non-Terrestrial Life", "The Nature of Consciousness and Intelligence", and "Detecting Life As We Do Not Know It". Breakthough Discuss was overseen by the Chairman of the Breakthrough Foundation, in this interview Dr Pete Worden. A former Brigadier. General, astrophysicist, professor and director of NASA Ames Research Centre provides an update

The story of Teide-1 (the first brown dwarf to be observed) is the story at the other end of a star's life cycle. That early stage is when stars transition from a huge cloud of dust and gas (billions of km across). to the size of a large planet (150,000 km). This is way smaller than the size of the sun and only a little larger than Jupiter.

On Thursday, 3rd January 2019, some water was added to some seeds in a tiny greenhouse. The seeds, cotton, potato, Rape and Arabidopsis sprouted. This was an experiment fonducted on the lunar surface

A brief but fascinating life and work of Professor Ivan Almar. he and his wife's contributions to asttronautics in Hungary during and after the Soviet era.

Did you know our galaxy (the Milky Way) has a magnetic field? News to me! Dr Vasu Shaw explains how astronomers go about understanding such phenomena. We also speak her fascinating international journey to becoming an astrophysicist.

Its not just cotton, trains and computers that Manchester is known for its innovation but aviation too. Frank Pleszak shares his insights in to the role Manchester played in aviation more than 100 years ago.

In this episode, Professor Rene Breton, originally from Quebec, has been working at the Jodrell Bank Centre for Astrophysics for over a decade. We discuss only a small part of his current research, including how Pulsars may one day be used as a GPS for interstellar travel.

In this episode, Professor Mike Garrett from @jodrellbank, discusses research activities at the #Jodrell Bank Centre for Astrophysics, including international collaborations, Dennis Walsh's work on #GravitationalLensing, and the increased #SETI activities through the #Breakthrough Listen Programme. Topics also include the Square Kilometer Array #SKA, Low-Frequency Array #LOFARtechnology, and the impact of #Brexit on Britain's international research participation.

Moonwalkers: A Journey with Tom Hanks is an immersive audio-visual experience in a unique venue in the centre of London. Written by @alifeofriley and Tom Hanks. Available only in London and only until 13th October 2024

If you want to learn about the life and work of rocket pioneer Hermann Oberth, there is only one place to visit. The Hermann Oberth Space Travel Museum in the German Town of Feucht, near Nurnberg. @OberthMuseum #Oberth

Euclid, a @esa science mission, will shed light on both dark matter and dark energy. It was launched in July 2023 and arrived in its L2 orbit a month later. It has just two instruments which will produce a high-resolution 3-D map of a third of the sky, stretching back 10 billion years during its initial 6-year operational lifetime.

Following the successful landing of @isro #Chandrayaan-3, Associate Project Director Kalpana Kalahasti was the first female to speak at the ISRO live stream event. As a seasoned engineer, Kalahasti contributed to numerous projects including SARAL in 2013. Here she talks about her journey with ISRO which began in 1999 as a radar engineer.

The 100 year starship project @100YSS aims to get humanity to develop the capability to travel to the stars in one hundred years time. It started in 2012 headed by Dr Mae Jemison the first woman of colour to fly in to space in STS 47 in 1992.

I first came across the Antikythera Mechanism just over a decade ago. It is still the most incredible artefact from history. It is as out of place in our time as William Shakespeare using an Iphone or Vasco De Gama travelling in a speedboat. The Antikythera Mechanism is a complex mechanical (clockwork) device that can determine the position of the planets and phases of the Moon and predict when solar and lunar eclipses will occur. Constructed about two thousand years ago, it was discovered in 1901.

The Clarke Exobelt is the name that Dr Hector Socas-Navarro has given to perhaps the largest structure humans have built. A collection of satellites in earth orbit (geosynchronous) 36,000 km radius. All circling the earth at the same speed in the same direction. The density of this orbit has been increasing since the 1960s but is not yet sufficiently dense for detection from interstellar distances. But in 200 years it may be. In the meantime, this concept works the other way around too. SETI researchers can search for these megastructures or Tecno Signatures to look for extraterrestrial intelligence

The Clarke Exobelt is the name that Dr Hector Socas-Navarro has given to perhaps the largest structure humans have built. A collection of satellites in earth orbit (geosynchronous) 36,000 km radius. All circling the earth at the same speed in the same direction. The density of this orbit has been increasing since the 1960s but is not yet sufficiently dense for detection from interstellar distances. But in 200 years it may be. In the meantime, this concept works the other way around too. SETI researchers can search for these megastructures or Tecno Signatures to look for extraterrestrial intelligence

European Space Agency's Dr Paul McNamara was studying low-frequency gravitational waves just before they were discovered in 2015. Now he is the astronomy and astrophysics coordinator for the European Space Agency. In this interview, recorded in Athens during Cospar2022, he speaks about some of the exciting science missions that ESA will be launching later this decade.

Dr Ralph Lorenz speaks about Dragonfly, a return mission to land on Titan. This mission, for which he is the mission architect, is like no other. It is not really a lander or rover but a quadcopter that will sample different regions near the landing site during its 3.3-year lifetime.

When it comes to the pioneers of rocketry, tradition has it that it was Tsiolkovsky, Goddard and Oberth. in this episode, author Rob Godwin talks about William Leitch from Scotland. He was writing about rocketry from the 1850s

Astronomer Dr Connor Nixon @shamrocketeer speaks about the @nasawebb program to observe solar system objects using the #JWST led by @hbhammel

In 1972, Harrison Schmitt became the first (and so far only), scientist to walk on the surface of the Moon. Since then many scientists have brought their scientific insights to understanding to the solar system and their moons. geologist @sanjeevgupta45 from @imperialcollege talks about Mars

Niklas Hedman, the Acting Director of the @UN Office for the Peaceful Uses of Outer Space (UNOOSA) talks about @UNOOSA ongoing role in facilitating and promoting the peaceful uses of space in Low Earth orbit and beyond.

Sandra Benitez-Herrera talks about the opportunities for teachers and students made available by the European Space Agency 's CESAR (Cooperation through Education in Science and Astronomy Research) program. @esa

A chance meeting with James van Allen led Stamatios Krimigis to build instruments for Mariner 3 and 4. Eventually became a Principle Investigator for the charged particle instrument on voyager which was initially known as Mariner Jupiter Saturn 77 program

Astrophotographer Nik Szymanek shares his unique perspective on how astrophotography has evolved since the 1980s when he first started. We speak about software and robotic telescopes @telescopelivehq @APinSpain & @astronomynow get a mention.

Following an unexpected meeting with USA's first Astronaut, Alan Shepard in around 1962. In this episode he recounts a Moon-Bounce experiments with @Nasa.

Since the beginning of human civilisation, people have looked up at the night sky and wondered – are we alone? Science and technology of the 20th century has made it possible to try to address that question. So how is are we doing? With Jill Tarter from @SETIInstitute

The latest book from author Brian Harvey @BrianHarveyAut1, this is probably the first English language analysis of the individuals, institutions and early space projects that would eventually lead,  not just France, but Europe to its status as a leader in designing, building and operating complex space infrastructure. 

How has the ¢SETI evolved over the last 6 decades and especially what can modern technology allow today that was not possible then? With Jill Tarter from @SETIInstitute

On 14th January 2005, the Huygens probe landed on Titan. Saturns and the solar systems largest Moon. This was a joint NAS/ESA mission called Cassini-Huygens. Whilst Huygens landed on Titan, Cassini continued to orbit Saturn. Professor John Zarnecki, the prinicpal investigator for the Surface Science Package, recalls the experience of that mission and what we learnt about Titan then and since.

The idea of Panspermia, that life exists throughout the universe and spreads via asteroids, comets and cosmic dust, has been around for a long time. Two of the strongest advocates were Professor Fred Hoyle and Professor Chandra Wickramasinghe.

In 1994, Narayan Nambi an ISRO aerospace engineer was falsely arrested by the Investigation Beuro on charges of espionage. He was accused of passing on confidential launch vehicle flight test data to foreign nationals. In 1996 he was cleared by the Central Investigations Bureau and India's Supreme Court found him not guilty in 1998. In 2019 he was presented with India's third-highest civilian award, the Padma Bhushan.

This interview with S Somanath (director of the Vikram Sarabhai Space Centre) and R Umamaheshwaran (Scientific Secretary) was recorded on 24th October 2019 during the International Astronautical Congress in Washington DC. It was not focused on a specific theme but rather an update on all things @ISRO - current and future activities.

In his 1979 novel, Fountains of Paradise, Arthur C Clarke imagines a cable stretching from the Earth's equator to Geosynchronous orbit. He called it a "space elevator" and imagined it would be constructed from continuous pseudo-one-dimensional diamond crystals. Bangalore based NoPo Technologies is now commercially producing Carbon Nanotubes. Could this material, one day be used to construct Clarke's space elevator?

As in other nations, the private space sector is now emerging in India. One name that pops up when discussing private and commercial space in India is Narayanan Prasad

Episode 87 - Apollo Era recollections of a Brit working in @NASA