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Sponsor Link: This episode of Space Nuts is brought to you with the support of NordVPN.. To check out special money saving deal, visit www.nordvpn.com/spacenuts   Space Nuts: Q&A on Radial Velocity, Dark Matter, and Angular Momentum In this engaging Q&A episode of Space Nuts, hosts Andrew Dunkley and Professor Fred Watson tackle a variety of intriguing listener questions, ranging from the complexities of radial velocity in exoplanet detection to the mysteries of dark matter and angular momentum in black holes. Join them as they explore these cosmic conundrums with their characteristic wit and expertise. Key topics - Hussein from Yemen asks about the radial velocity method for detecting exoplanets, prompting a discussion on how astronomers can isolate individual planets from the combined gravitational effects of multiple bodies. - Martin from Maryland raises a thought-provoking question on the potential to harness dark energy for space flight, leading to an exploration of the feasibility of accelerating spacecraft to near-light speeds. - Peter from Sweden inquires about the angular momentum of matter falling into black holes, sparking a conversation on whether this matter retains its momentum or needs to shed some energy before crossing the event horizon. - Andrew and Fred Watson also touch on the ongoing search for Planet Nine and the importance of surveying exoplanets for understanding the universe's structure and potential for life beyond Earth. Timestamps 00:00 - Introduction to the Q&A format and listener questions 01:20 - Hussein's question about radial velocity and exoplanets 10:30 - Martin's inquiry on harnessing dark energy for space travel 18:45 - Peter's question about angular momentum and black holes 26:00 - Discussion on the significance of ongoing exoplanet surveys 32:15 - Closing thoughts and listener engagement Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Perseverance drove to the edge of an ancient Martian lake expecting a beach and found the inside of a volcano — rock that water has been through at least three separate times. Europe's Jupiter probe comes home on Monday night and crosses Australia in a fully dark sky. Two teams, using two completely different techniques, both find something hiding inside the most famous planetary system we have ever photographed — and an Australian instrument is in the middle of one of them. Plus: heavy water in an interstellar comet, and what it says about the star that made it. In this episode ·         LEAD — Three floods at the crater's edge. Candice Bedford (Purdue) and colleagues publish in Communications Earth & Environment: the Margin Unit at Jezero is igneous, not sedimentary, and records at least three distinct episodes of water — CO₂-rich groundwater making carbonate ridges, then silica associated with the lake, then a later hot-water event leaving fluorite veins. Habitability context, not a biosignature. ·         Juice returns. ESA confirms the third Earth gravity assist for 28 September — closest approach 11:45 UTC over the Indian Ocean, bending the trajectory ~20° and adding ~3.5 km/s. The spacecraft crosses Australia north-east to north-west 15–30 minutes earlier, in full darkness. ·         HR 8799. Two preprints in two weeks point at a fifth, inner planet — one from archival JWST aperture-masking data (~7 au, a few Jupiter masses), one from Gaia astrometry (2–3 au, 10–14 Jupiter masses). They do not obviously describe the same object. Neither is peer-reviewed. ·         3I/ATLAS. A modelling paper explains the high deuterium-to-hydrogen ratio measured in March as consistent with formation around a low-metallicity — meaning old — star. ·         Quick hit: Starship Flight 14 still targeting 28 September; Crew-13 still 'no earlier than early October' on NASA's own page; Albania signs the Artemis Accords as the 73rd country. ·         Skywatch: the equinox as an instant rather than a date, the Juice pass over Australia, Venus and Mercury for the south, Mars and Jupiter before dawn for the north, and Saturn heading into opposition. Sources and further reading ·         Bedford, C. C. et al., 'Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars', Communications Earth & Environment (2026). DOI 10.1038/s43247-026-03997-9 ·         NASA/JPL, 'NASA Discovery Reveals Complex Water Systems on Early Mars', 21 September 2026. ·         ESA, 'Juice to fly past Earth for third gravity assist', 21 September 2026. ·         Nguyen, J. S. et al., 'A Candidate Innermost Fifth Planet In the HR 8799 System Revealed By JWST NIRISS Aperture Masking Interferometry', arXiv:2609.10507. ·         Lagrange, A.-M. et al., 'A fifth companion in the HR 8799 system revealed by Gaia', arXiv:2609.20996 (submitted to Nature Astronomy). ·         Furuya, K., Cordiner, M., Bockelée-Morvan, D. et al., arXiv:2609.12370. ·         NASA OIIR, 'NASA Welcomes Albania as Newest Artemis Accords Signatory', 21 September 2026. Skywatch figures computed in-session with PyEphem 4.2.1 for Sydney, Los Angeles, New York and London. Times are local unless marked UTC. Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Space Nuts: Q&A on BepiColombo, Neutrinos, and Time Dilation In this Q&A edition of Space Nuts, hosts Andrew Dunkley and Professor Fred Watson dive into a series of intriguing listener questions that span topics from the nuances of orbital velocity to the enigmatic world of neutrinos and the complexities of time dilation. Join them as they unravel these cosmic queries with their signature blend of insight and humour. Key topics - Larry from Nebraska asks about the BepiColombo mission and the relationship between gravitational assists and orbital velocity, prompting a discussion on how spacecraft navigate the solar system. - Eduardo explores the nature of neutrinos, questioning whether they are affected by gravity and whether they can be trapped by black holes. - Shumo presents a thought-provoking idea about using high-energy gamma rays or neutrinos as interstellar beacons, leading to a discussion on the potential for advanced civilisations to communicate through unconventional means. - Colin from Adelaide raises questions about time dilation effects as depicted in the science fiction movie "Project Hail Mary," specifically the implications of travelling close to the speed of light and the resulting age differences upon return to Earth. Timestamps 00:00 - Introduction to the Q&A format and listener interactions 01:20 - Larry's question about BepiColombo and gravitational assists 10:30 - Eduardo's inquiry on neutrinos and black holes 18:45 - Shumo's question about interstellar beacons using gamma rays or neutrinos 26:00 - Colin's confusion about time dilation in "Project Hail Mary" 32:15 - Discussion on the implications of time dilation and relativity Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Sponsor Link: This episode of Space Nuts is brought to you with the support of NordVPN. your first stop for online privavcy. To check out our special offer with a 30 day money back guarantee, visit www.nordvpn.com/spacenuts Space Nuts: Venus’s Missing Moon, Satellite Pollution, and Space Force Uniform Controversy Space Nuts covers three very different space stories in this episode, ranging from planetary science to the consequences of satellite reentry and a controversial military uniform design. Andrew Dunkley and Professor Fred Watson also field listener questions on orbital mechanics, neutrinos, alien communication, and time dilation. The discussion is broad, but the main thread is clear: how real-world physics shapes everything from Venus’s history to the future of spaceflight and even the look of space-age uniforms. Key topics Venus is Earth-like in size, mass, and gravity, but unlike Earth it has no moon, and the episode explores whether it may once have had one. Fred explains a modeling study led by Stephen Kane suggesting a Venus moon could have spiraled inward, crossed the Roche limit, and been torn apart by tidal forces. The team discusses what evidence might remain if Venus once consumed a moon, including possible chemical fingerprints in the atmosphere or surface. Satellite pollution is examined through the lens of reentering spacecraft, especially the growing number of Starlink reentries and their impact on the upper atmosphere. The European Space Agency’s jet-based chase of two reentering Cluster spacecraft, Tango and Samba, is described as an effort to measure reentry byproducts directly. The conversation raises concerns about aluminium oxides, atmospheric chemistry, and whether repeated reentries could have broader consequences such as ozone depletion. The final main story looks at proposed United States Space Force uniforms and why the design drew immediate comparisons to World War II-era fascist aesthetics and Starship Troopers. Andrew and Fred note how uniform design can shape perception, and why the new concept feels divisive rather than inspiring. Timestamps 00:00 - Intro and setup for the episode 00:41 - Venus, satellite pollution, and Space Force uniforms preview 04:40 - Venus as Earth’s twin and why it has no moon 08:21 - Modeling a missing Venusian moon 09:20 - Gravitational tug-of-war and moon migration toward Venus 11:44 - Conditions for a moon to survive around Venus 12:43 - Possible traces of an ancient moon impact 16:06 - Satellite pollution from reentering spacecraft 17:16 - Starlink reentries and atmospheric contamination 18:14 - ESA’s jet chase of reentering Cluster spacecraft 20:06 - Observing Tango and Samba during controlled reentry 21:45 - Why the atmospheric consequences could become controversial 23:12 - Wood as a potentially more benign spacecraft material 24:16 - Space Force uniforms and the first visual reaction 25:34 - Starship Troopers and deliberate fascist design cues 27:29 - Why the proposed uniforms feel unsettling Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Sponsor Link: This episode of Space Nuts is brought to with the support of NordVPN. To grab our special NordVPN deal, simply visit www.nordvpn.com/spacenuts ....take control of your online privacy because no-one else is going to do it for you! Space Nuts: Q&A on Mitsubishi's Role in Telescope Manufacturing, Jupiter's Storms, and Gravitational Waves In this Q&A episode of Space Nuts, hosts Andrew Dunkley and Professor Fred Watson tackle a range of fascinating listener questions, from the involvement of Mitsubishi Heavy Industries in telescope manufacturing to the mysteries of Jupiter’s storms and the nature of gravitational waves. Join them as they delve into these cosmic queries with their signature wit and expertise. Key topics - Thomas from Canberra asks about Mitsubishi Heavy Industries and their role in the manufacturing of telescope hardware at Siding Spring Observatory. Fred Watson explains the engineering behind the Anglo-Australian Telescope and the significance of its construction. - Young listener Emily poses a question about Jupiter's Great Red Spot, prompting a discussion on the dynamics of storms and atmospheric patterns on the gas giant. - Butch from the UK inquires about the Parker Solar Probe and its mission to study the sun, as well as the advancements in solar observation technology. - Trent from North Georgia wonders if gravitational waves are slowed down by passing through matter, leading to an insightful explanation of how these waves interact with the fabric of spacetime. - The episode wraps up with a lively discussion on the role of artificial intelligence in astronomy and its implications for the future of scientific research. Timestamps 00:00 - Introduction to the Q&A format and listener interactions 01:20 - Thomas's question about Mitsubishi Heavy Industries and Siding Spring Observatory 10:30 - Emily's question about storms on Jupiter 18:45 - Butch's inquiry on the Parker Solar Probe and solar missions 26:00 - Trent's question about gravitational waves and their speed 32:15 - Discussion on artificial intelligence in astronomy and its impact 40:00 - Closing remarks and listener engagement Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Space Nuts: Dark matter clues, Saturn’s new decagon, Mars and Titan missions. Andrew Dunkley and Professor Fred Watson cover a packed astronomy episode that moves from a tentative dark matter signal to a newly spotted ten sided storm pattern on Saturn. They also dig into two upcoming sample return style missions, one to Mars and one to Titan, before finishing with listener questions about Jupiter’s Great Red Spot, solar missions, gravitational waves, and AI in astronomy. Key topics In this episode, Andrew and Fred discuss the Lux-Zeppelin underground detector result, where researchers saw a low-energy flash that might be consistent with dark matter, though the signal is still far short of discovery level. Fred explains why dark matter is inferred from galaxy rotation and gravitational lensing, and why direct detection experiments need to be buried deep underground and shielded from background noise. The discussion covers Fred’s own migraine aura experience, including the zigzag visual pattern he describes as a brain-based phenomenon that affects both eyes. In this episode, they celebrate an outback astronomy success story involving Trevor Barry of Broken Hill, whose long-term Saturn observations helped connect amateur and professional work on planetary atmospheres. Fred explains Saturn’s famous north polar hexagon and the newly reported south polar decagon, noting that the southern feature appears to have formed only since 2023. They cover China’s Tianwen-3 Mars sample return plans, including the narrowing of candidate landing sites from 86 to 12 and the mission’s focus on clay-rich terrain that may preserve signs of ancient life. Fred and Andrew also discuss NASA’s Dragonfly mission to Titan, including the chosen region near Selk crater, the expected 3.3-year primary mission, and why Titan’s dense atmosphere makes rotorcraft flight more practical there than on Mars. Timestamps 00:00 - Pre-show timing and getting ready to go live 00:49 - Welcome to Space Nuts and what’s coming up 02:23 - Fred joins the show and mentions recovering from knee surgery 03:17 - First story: a possible dark matter detection at Lux-Zeppelin 05:28 - Why dark matter is hard to detect directly 06:56 - Underground detectors and the LZ experiment in South Dakota 08:50 - The flash event and why it is only a hint, not a discovery 11:44 - The 2.6 sigma result and what that means statistically 13:55 - Trevor Barry and the discovery of Saturn’s south polar decagon 16:23 - Saturn’s north polar hexagon and why the south is unusual 17:49 - The decagon’s possible recent formation and what comes next 21:26 - China’s Tianwen-3 Mars sample return mission 23:40 - Candidate landing sites narrowed down and why clays matter 25:20 - NASA’s Dragonfly mission to Titan 26:03 - Why the Titan landing region near Selk crater is scientifically interesting 27:31 - Dragonfly’s three point three year primary mission and Titan’s chemistry 29:09 - Listener shout-outs and wrapping the first half Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Space Nuts: Q&A on the Swift Satellite, Redshift, and Hypothetical White Holes In this engaging Q&A edition of Space Nuts, hosts Andrew Dunkley and Professor Fred Watson dive into a myriad of intriguing questions posed by listeners. From the fate of the Swift satellite to the mysteries of redshift and the speculative nature of white holes, this episode covers a wide range of cosmic curiosities. Key topics include: - The fate of the Swift satellite and the challenges faced by the Link mission meant to boost its orbit. - An exploration of redshift and the implications of energy loss in distant light. - Insights into the temperature variations on the Moon and the potential for human habitation beneath its surface. - A thought-provoking discussion on the hypothetical merger of black holes and white holes, and what that could mean for our understanding of the universe. Join Andrew and Fred Watson as they tackle these questions with their signature blend of humour and expertise, providing listeners with a deeper understanding of the cosmos. 00:00 - This is where the audience asks us questions, we scratch our heads 01:20 - Do you always record on the same day and time 02:56 - What are your thoughts on the red dots as seen by James Webb Telescope 06:33 - A spacecraft called Link will boost the decaying orbit of the Swift satellite 14:08 - Is distant light redshifted? What happens to the lost energy 16:18 - Professor Fred Watson discusses Apollo 13 problems in Q and A edition 17:19 - Fenton from Minnesota has a question about the temperature on the moon 23:13 - European astrobiologist working on Roslyn Franklin rover on Mars 26:03 - Fred Watson asks what would happen if a white hole merged with a black hole Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Space Nuts: Spanish Eclipse, Nancy Grace Roman Launch, Cloud Nine, and Venus's Mysterious Clouds Andrew Dunkley and Professor Fred Watson cover four big astronomy stories in this episode, from Fred’s trip to view a sunset eclipse in Spain to the launch of the Nancy Grace Roman Space Telescope. They also unpack a starless dwarf galaxy called Cloud Nine and a new way of thinking about the strange dark material in Venus’s clouds. Guests and speakers Andrew Dunkley - Host, frames the news, asks listener questions, and guides the discussion. Professor Fred Watson - Astronomer at large, explains the eclipse, the Roman telescope, Cloud Nine, and Venus’s clouds. Key topics In this episode, Fred recounts the Spanish eclipse expedition The eclipse was only 9 degrees above the western horizon at totality, making the viewing conditions unusually challenging. He and Marnie led a 16-person tour through France, Spain, and Switzerland before settling near Santander in northern Spain. They staked out a viewing site 2 kilometers from the hotel, set up a gazebo, and had to tie it down to a car to keep it from blowing away. The weather looked threatening, but a hole opened in the cloud just before totality, giving them a clear view of the corona. Fred described the yellowish corona, pink hydrogen clouds, and the crowd of around 2,000 people. We discuss the Nancy Grace Roman Space Telescope launch Andrew watched the launch live after being nudged by his own brain at the right moment. Fred noted the launch was flawless, with 27 Merlin motors firing. The telescope is headed for the L2 Lagrange point, about 1.5 million kilometers away. Roman is a 2.4-meter Hubble-class telescope but with 100 times the field of view. Its wide-angle infrared design should enable major surveys of dark matter, dark energy, and exoplanets via its coronagraph. Fred explains why Cloud Nine matters Cloud Nine is described as a starless dwarf galaxy about 14 million light years away. It lies near Messier 94 and was studied using the Gran Telescopio Canarias and its Hypercam instrument. The deep exposure was 2.36 hours, yet the team found no convincing stellar population. Fred says theory suggests the gas may be too hot to cool and collapse into stars because of the ultraviolet background radiation after reionization. He says Cloud Nine may be the first strong example of a galaxy predicted by standard cosmology but never before clearly identified. Venus’s clouds are still puzzling astronomers Fred explains that Venus appears yellowish because we see the top of its cloud layer, especially in visible light. In ultraviolet, Venus shows dramatic global cloud patterns caused by an as-yet unidentified absorber. The new study uses radiative transfer modeling to constrain what the unknown absorber could be. The team compares Venus’s cloud droplets to cigarette smoke, tiny particles that look light-colored when dispersed but could become dark sludge in bulk. The result suggests the absorber must be very efficient, very concentrated, or both, but it is not being claimed as evidence of life. Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

In this intriguing Q&A episode of Space Nuts, hosts Andrew Dunkley and Professor Jonti Horner tackle a variety of cosmic queries from listeners. Join them as they explore the fascinating world of radio telescopes and how they produce images from radio waves, delve into the complexities of gravitational waves, and ponder the sounds and smells of space. Key topics include: - How photographic images are generated from radio telescopes, despite only receiving radio waves, and the fundamental principles behind this technology. - A deep dive into gravitational waves, their impact on space, and how LIGO detects these minute disturbances in the fabric of spacetime. - An imaginative discussion on what sounds might exist in space and the potential smells one could encounter beyond Earth’s atmosphere, including the curious idea of cosmic fragrances. Join Andrew and Jonty as they demystify these concepts, providing clarity and insights into the wonders of astronomy and space science. 00:00 - Space Nuts aims to answer questions from the audience about astronomy and space science 01:37 - Were the pyramids built by aliens or were they built by humans 04:26 - How is a photographic image produced from a radio telescope and not an optical telescope 12:36 - Dean: I often hear about gravity waves and I have a hard time visualising 20:15 - Andrew Dunkley: I think ideas become easier to explain over time 22:45 - Our next question comes from David from Port Washington, New York 30:37 - Several volcanoes have blown up since we've been to them 32:08 - The metropolitan area of Auckland contains 53 volcanoes 35:02 - If you could take a big inhale, what would space smell like 36:22 - If you would like to send us some questions, please do through our website Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Space Nuts: Moon impact, Roman Observatory launch, and Neptune’s odd moons Andrew Dunkley is joined by Professor Jonti Horner, Professor of Astrophysics at the University of Southern Queensland, for a wide-ranging astronomy update. They cover SpaceX’s out-of-control rocket body hitting the Moon, the imminent launch of the Nancy Grace Roman Observatory, and a new result that may explain the strange origin of some of Neptune’s moons. We discuss why lunar impacts matter far beyond the Moon itself, how Roman will study exoplanets and dark energy, and why clay minerals on Neptune’s small moons are such a big clue about a violent early solar system. Key topics SpaceX’s rocket body impacted the Moon after being left in a long, uncontrolled orbit Why lunar impacts are a real concern for future habitats, infrastructure, and Apollo heritage sites The sheer scale of human-made objects that have already hit or landed on the Moon Elon Musk’s vision for lunar factories, rail-gun launches, and large-scale off-Earth manufacturing Why the same company could end up both creating the risk and needing to solve it The Nancy Grace Roman Observatory launching around 9 months ahead of schedule Roman’s 2.4 metre mirror, 300 megapixel wide-field camera, and hydrazine-fueled journey to L2 How Roman will study dark energy, gravitational lensing, exoplanets, and free-floating planets New James Webb observations of Neptune’s moons showing clay-type minerals on Larissa and Galatea Why those clays suggest a much older, more violent system shaped by Triton’s capture and moon-to-moon collisions Timestamps: 00:00 - Studio prep, muting phones, and getting ready to record 01:53 - Episode intro: SpaceX lunar impact, Roman Observatory, and Neptune moons 03:00 - Jonti Horner joins the show 04:26 - SpaceX rocket body crashes into the Moon 07:03 - Predicted impact plume and expected crater size 08:54 - Korean spacecraft Danuri captures post-impact images 10:19 - Why Moon impacts matter for future lunar bases 11:47 - Protecting Apollo landing sites and lunar archaeology 12:15 - More than 3,000 human-made objects have hit the Moon 14:32 - Law, responsibility, and the problem of cleanup beyond Earth 16:07 - Musk’s plans for Moon factories and Starlink-style expansion 18:12 - Rail guns, Optimus robots, and scaling lunar industry 19:34 - SpaceX’s own industry could be threatened by its own debris 21:24 - Balancing commercial benefits and environmental costs 23:46 - The Nancy Grace Roman Observatory launch approaches 26:03 - Roman’s orbit, hydrazine fuel, and five-year mission plan 27:57 - From WFIRST to Roman: how the telescope evolved 29:23 - Roman’s mirror, 300 megapixel camera, and survey power 30:14 - Exoplanets, microlensing, and the coronagraph 33:29 - Roman’s launch status and the excitement ahead 34:17 - Neptune’s moons and the role of Triton Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Sponsor Link: This episode of Space Nuts is brought to you with the support of NordVPN. Protect your online activities with a special deal at www.nordvpn.com/spacenuts. In this Q&A episode of Space Nuts, hosts Andrew Dunkley and Professor Jonti Horner tackle a variety of fascinating questions from listeners. From the intriguing phenomenon of planetary atmospheres that may rain diamonds and sapphires, to the complexities of satellite approvals and the possibility of planets forming without a star, this episode is packed with cosmic insights. Key topics include: - Nick from Perth asks about the science behind the claims of diamond and sapphire rain on distant planets, prompting a discussion on spectral analysis and the nature of scientific reporting. - Sandy from Melbourne raises concerns about the recent FCC approval for Reflect Orbital's satellite, leading to an exploration of the regulatory landscape surrounding space launches and the implications for global cooperation. - Rennie from California queries whether planets can form without a sun, which sparks a deep dive into the theories surrounding rogue planets and the role of dark matter in planetary formation. Join Andrew and Jonty as they navigate these thought-provoking questions, shedding light on the mysteries of the universe and the ever-evolving field of astronomy. 00:00 - This is a Q and A episode and in this particular show we're answering audience questions 01:00 - Professor Jonty Horner joins us to discuss astrophysics 01:29 - The heat stays a bit longer than summer and the cold stays too much past winter 02:55 - Nick in Perth has a question regarding planetary atmospheres 11:29 - Scientists are extrapolating from what they know about planets' interior 12:49 - Andrew Dunkley: Question comes from Sandy in Melbourne, Australia 14:51 - FAA proposing to circumvent environmental laws for commercial launches and spacecraft reentries 21:54 - Fast developing industry with no regulation developed around it 25:20 - Space Nuts Q and A edition with Andrew Dunkley and Jonty Horner 25:38 - Can planets form without a sun because dark matter would be the gravity 33:41 - You can send in your Space Nuts questions via our website Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Sponsor Link: This episode of Space Nuts is brought to you with the support of NordVPN. Secure your online presence and enjoy a special deal at www.nordvpn.com/spacenuts.   Asteroid or comet, dinosaur impact firestorms, crater discovery, and Q&A on exoplanets and satellites Andrew Dunkley is joined by Professor Jonti Horner of the University of Southern Queensland for two tightly related Space Nuts conversations. The first explores how astronomy keeps blurring the lines between asteroids and comets, what new research says about the dinosaur-killing impact, and a surprising crater found by an amateur astronomer planning a trip. The second is a listener Q&A covering exotic exoplanet weather, space regulation, and whether planets can form without a star. Key topics In this episode, Andrew and Jonti explain why astronomy often uses tidy labels for objects that sit on a continuum, especially when the line between asteroid and comet gets blurry. They discuss near-Earth object 1998 SH2, which appears to have comet-like activity despite looking asteroid-like for decades. Jonti breaks down how outgassing can nudge a small body off its predicted path, revealing non-gravitational forces. The dinosaur-killing impact is revisited with new modelling suggesting the first hours after impact may have included global firestorms, not just long-term climate collapse. The show covers the terminology debate around meteor, meteorite, fireball, bolide, asteroid, and comet impact. A Canadian amateur astronomer, Joel LePointe, is credited with spotting a likely impact crater while planning a camping and hiking trip using satellite imagery. The newly identified crater near Lake Marcel in northern Quebec is described as about 390 million years old and roughly 25 kilometers wide. Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

Sponsor Link: This Q&A episode of Space Nuts is brought to you with the support of NordVPN. When you decide to get serius about your security online, do what we did and get NordVPN. We have a special deal for you too, chck out the details at www.nordvpn.com/spacenuts In this episode of Space Nuts, hosts Andrew Dunkley and Professor Fred Watson delve into a captivating Q&A session, tackling a range of intriguing questions from listeners. From the possibility of moons having atmospheres to the mysteries surrounding hot Jupiters and the fascinating realm of black holes, this episode promises to ignite your curiosity about the cosmos. Key topics include: - Chris from Exmouth wonders if moons can have atmospheres and if they can share these with their parent planets, leading to a discussion on Titan and Pluto's unique characteristics. - An anonymous listener poses a thought-provoking question about 'secret astronomy' and the potential for military satellite technology to advance our understanding of the universe. - Fenton from Minnesota asks about the likelihood of rocky planets existing in solar systems with hot Jupiters, prompting a discussion on planetary migration and the diversity of solar systems. - Ed raises a classic black hole question regarding the merger of black holes and the concept of mass escaping, leading to an exploration of gravitational waves and their implications. Join Andrew and Fred Watson as they navigate these fascinating topics, providing insights and sparking further exploration into the wonders of space. 00:00 01:18 04:13 05:37 11:35 16:34 20:35 27:11 31:31 Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

This episode covers three very different astronomy stories and then moves into a lively Q&A with listener questions. Andrew Dunkley and Professor Fred Watson discuss a possible sugary molecule in the center of the Milky Way, the risk lunar landers may contaminate ice that could preserve clues to life’s origins, and a new way to track lost dogs using satellite connectivity. The second half of the episode answers questions about moons with atmospheres, secret astronomy, hot Jupiters, and black hole mergers. Key topics In this episode, Fred Watson explains an update from Peter Verweyen on MOND, now referred to as Aether Scalar Tensor Theory, and how it relates to dark matter and dark energy debates. We discuss the detection of erythrulose, a sugar molecule found in interstellar gas clouds near the center of the Milky Way, and why this matters for prebiotic chemistry. Fred describes how molecules like sugar can form in cold molecular clouds before stars and planets exist, making some ingredients for life surprisingly common. We discuss a new study warning that rocket exhaust from future lunar landings could contaminate ice in permanently shadowed craters at the Moon’s south pole. The Moon’s polar ice may contain ancient prebiotic molecules delivered by comets, asteroids, and dust, making it a possible time capsule for the chemistry that led to life. We discuss the practical and ethical problem that landers have to use rocket engines, and those exhaust plumes may spread methane and other organics across the lunar surface very quickly. Fred shares how satellite-based direct-to-cell or direct-to-mobile systems could help locate lost dogs in remote places without cell coverage. We discuss how this kind of tracking builds on existing GPS pet trackers, and how it could be useful in wilderness areas, while also noting the limits and concerns in national parks. Timestamps (00:00) Start of the episode and what’s coming up (03:12) MOND update and the new AEST name (07:10) A sugary molecule in the center of our galaxy (09:51) Why sugar can form in deep space before stars exist (12:24) Why lunar landings could contaminate the Moon’s ice (14:54) The Moon as a time capsule for prebiotic molecules (16:24) Methane exhaust and rapid contamination risk (18:37) Should the Moon be protected like a national park? (20:28) Satellite tracking for lost dogs in remote areas (24:52) Direct-to-mobile satellite technology explained (25:44) The Judas goat program and invasive species control Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support.

In this engaging Q&A episode of Space Nuts, join host Andrew Dunkley and astronomer Fred Watson Watson as they tackle a variety of fascinating questions from listeners. From the peculiarities of Martian days to the mysteries of black holes and the galactic centre, this episode is filled with enlightening discussions that are sure to spark curiosity about the cosmos. In this episode: - John asks about the implications of Mars' longer day length on human biology and potential adaptations for future colonists. - Dan inquires about the growth of black holes, exploring how quickly they can develop into supermassive entities and what happens when there’s nothing left to consume. - Young Thomas, just 11 years old, poses several intriguing questions about the galactic centre, including whether it can swallow all stars and planets in the galaxy, and the limits of a black hole's gravitational reach. - Paul reflects on historical discoveries in astronomy, specifically how Harlow Shapley determined our Sun's position within the Milky Way, challenging the long-held belief that it was at the centre. Join Andrew and Fred Watson as they explore these thought-provoking questions and more, encouraging listeners to continue their journey of exploration and discovery in the universe. Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-astronomy-insights-cosmic-discoveries--2631155/support. (00:00) This is a Q and A edition where we take audience questions (02:16) When and if Mars is populated with humans, how would we work with longer day (08:50) Andrew: How astronauts deal with gravity when they land on Earth (11:47) Dan from the Gold coast has some questions about black holes (12:51) Fred: How fast do black holes grow? Dan asks fundamental astrophysics question (18:17) Fred asks five questions about black holes from Thomas Reid, 11 (22:03) Thomas asks if black holes can swallow up all stars and planets (24:31) Final question comes from Paul from Las Vegas (26:42) It was actually 1919 when that discovery was made (34:24) We continue to receive great questions from great listeners and long may it continue