Episodes

  • Martian Ice and Cosmic Shadows - Unveiling Life and Dark Matter Mysteries

    Martian Ice and Cosmic Shadows - Unveiling Life and Dark Matter Mysteries
    Oct 31 2025
    In this episode of SpaceTime, we delve into groundbreaking discoveries that could reshape our understanding of life on Mars and the cosmos beyond.
    Martian Ice: A Potential Reservoir for Life
    A recent study suggests that Martian ice may be the most promising location to search for signs of ancient microbial life. Researchers found that biomolecules from dormant microbes degrade significantly slower in pure water ice compared to Martian soil mixtures. This discovery, published in the journal Astrobiology, raises hopes that future missions to Mars could uncover preserved organic materials in its icy regions, potentially revealing the planet's biological history.
    A Mysterious Dark Object in the Universe
    Astronomers have identified the lowest mass dark object ever detected, with a mass about a million times that of our Sun. This enigmatic object, reported in Nature Astronomy, may offer insights into the nature of dark matter, which constitutes a significant portion of the universe's mass. The object was detected through gravitational lensing, and its small size challenges existing theories about dark matter's composition and distribution.
    NASA's Call for Lunar Mission Bids
    NASA is seeking new bids for its Artemis Moon program, aiming to foster competition among American companies to return humans to the lunar surface. With ongoing delays from SpaceX, NASA Administrator Sean Duffy emphasizes the urgency of the mission as the U.S. races against China to achieve lunar exploration milestones. The upcoming Artemis missions promise to be pivotal in establishing a sustainable human presence on the Moon.
    November Skywatch with Jonathan Nally
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astrobiology Journal
    https://www.liebertpub.com/journals/astrobiology/1
    Nature Astronomy
    https://www.nature.com/natureastronomy/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Martian Ice: A Potential Reservoir for Life
    A Mysterious Dark Object in the Universe
    NASA's Call for Lunar Mission Bids
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    32 mins
  • Lunar Relics and Interstellar Insights: Discoveries from the Moon and Comet 3I ATLAS

    Lunar Relics and Interstellar Insights: Discoveries from the Moon and Comet 3I ATLAS
    Oct 29 2025
    (00:00:00) Lunar Relics and Interstellar Insights: Discoveries from the Moon and Comet 3I ATLAS
    (00:00:46) Relics of the outer solar system discovered on the Moon
    (00:03:30) Insights from interstellar comet 3I ATLAS
    (00:07:31) SpaceX's Starship Mega rocket test flight
    (00:23:54) The Science report
    (00:31:46) Episode Wrap

    In this episode of SpaceTime, we explore remarkable discoveries that provide new insights into our solar system and beyond.
    Relics of the Outer Solar System Found on the Moon
    A groundbreaking study reveals that meteorites found on the Moon originated from the outer solar system. Researchers from the Chinese Academy of Sciences have identified olivine-bearing clasts from lunar regolith collected by the Chang'e 6 mission. These relics, believed to be carbonaceous chondrites, offer critical information about the formation and evolution of planets. The findings suggest that the Moon serves as a pristine archive for meteorites, with implications for understanding the origins of lunar water and organic materials.
    Interstellar Comet 3I ATLAS: Insights into Alien Solar Systems
    The interstellar comet 3I ATLAS is revealing fascinating details about the composition of other solar systems. New observations indicate that 3I ATLAS has been active longer than expected, releasing various molecules as it travels through our solar system. This segment discusses how the comet's behavior challenges existing assumptions about comet activity and provides clues about the materials present in distant star systems.
    SpaceX's Starship Mega Rocket Test Flight
    SpaceX has successfully completed its 11th test flight of the Starship Mega rocket, demonstrating significant advancements in its design and capabilities. The mission involved various maneuvers, including hot staging and payload deployment, as well as tests of the spacecraft's reentry and landing procedures. This episode highlights the importance of these tests for future missions to the Moon and Mars, as SpaceX continues to refine the Starship for interplanetary travel.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Proceedings of the National Academy of Sciences
    https://www.pnas.org/
    Astrophysical Journal Letters
    https://iopscience.iop.org/journal/2041-8205
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Relics of the Outer Solar System Found on the Moon
    Interstellar Comet 3I ATLAS: Insights into Alien Solar Systems
    SpaceX's Starship Mega Rocket Test Flight
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    33 mins
  • Near Miss and Cosmic Spectacles: Asteroids, Comets, and Space Junk in Earth's Orbit

    Near Miss and Cosmic Spectacles: Asteroids, Comets, and Space Junk in Earth's Orbit
    Oct 28 2025
    (00:00:00) Near Miss and Cosmic Spectacles: Asteroids, Comets, and Space Junk in Earth's Orbit
    (00:00:46) Planet Earth experiences as asteroid near miss
    (00:02:58) Two green comets lighting up the night skies
    (00:07:31) Chinese space junk smashes into Western Australia
    (00:09:09) The Science Report
    (00:12:07) Skeptics guide to the magic healing Biomet
    (00:15:15) Show Wrap-up

    In this episode of SpaceTime, we dive into a series of astonishing astronomical events that recently unfolded, including a near-miss asteroid and mesmerizing comets lighting up our night skies.
    Asteroid 2025 TF: A Close Encounter
    An undetected asteroid, now designated 2025 TF, made a startling pass just 428 kilometers above Earth, equivalent to the altitude of the International Space Station. Detected by astronomers from Kitt Peak National Observatory six hours post-approach, this 3-meter space rock serves as a reminder of the many near misses that may go unnoticed. This episode discusses the implications of such encounters and the ongoing efforts to enhance planetary defense against potential threats.
    Green Comets Illuminate the Night Sky
    Skywatchers have been treated to the rare sight of two vibrant green comets, C 2025 R2 Swann and C 2025 A6 Lemon, both originating from the Oort Cloud. As they approach the sun, these comets are heating up and releasing gases, creating their characteristic tails. This segment explores their trajectories, visibility, and the exciting opportunity they present for amateur astronomers, particularly as they coincide with the annual Orionid meteor shower.
    Chinese Space Junk Crash in Australia
    In a dramatic turn of events, debris from the Chinese Jielong 3 rocket has been discovered smoldering in Western Australia's outback. This segment details the recovery of the wreckage and the ongoing investigation by the Australian Space Agency. The incident raises concerns over space debris management, especially in light of previous accidents involving Chinese spacecraft.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astronomy and Astrophysics
    https://www.aanda.org/
    Geophysical Research Letters
    https://agupubs.onlinelibrary.wiley.com/journal/19448007
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Asteroid 2025 TF: A Close Encounter
    Green Comets Illuminate the Night Sky
    Chinese Space Junk Crash in Australia
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    16 mins
  • Dust Devils and Tectonic Tales: Unraveling Mars and Earth's Deep History

    Dust Devils and Tectonic Tales: Unraveling Mars and Earth's Deep History
    Oct 17 2025
    In this episode of SpaceTime, we uncover the latest findings in Martian meteorology, delve into Earth's ancient tectonic activity, and prepare for humanity's return to the Moon.
    Raging Winds on Mars: Unveiling Martian Weather Patterns
    A groundbreaking study published in the journal Science Advances reveals that wind speeds on Mars can reach up to 160 km/h, significantly higher than earlier estimates. Lead author Valentin U.H. Meckel from the University of Bern discusses how these powerful winds, along with dust devils, play a crucial role in shaping Mars' climate and dust distribution. This episode explores how the observations from the European Space Agency’s Mars Express and ExoMars Trace Gas Orbiter have provided unprecedented insights into Martian atmospheric dynamics, which are essential for planning future manned missions to the Red Planet.
    Unlocking Earth's Deep Past: New Insights into Subduction
    In a surprising twist to our understanding of early Earth, a new study published in Nature Communications suggests that subduction and continental crust formation occurred much earlier than previously believed. Researchers utilized advanced geochemical analysis of ancient olivine crystals to challenge the notion of a stagnant lid tectonic regime during the Hadean eon. This episode discusses the implications of these findings on our understanding of Earth's geological history and the processes that shaped our planet's surface.
    NASA's Artemis II: Preparing for Lunar Exploration
    NASA is set to send astronauts back to the Moon with the Artemis II mission, slated for launch in early 2026. This episode provides an overview of the mission's objectives, including a ten-day crewed flyby of the Moon, which will test the Orion spacecraft and gather crucial scientific data. As the crew prepares to explore the lunar far side, we discuss the significance of this mission for future lunar habitation and potential manned missions to Mars.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Science Advances
    https://www.science.org/journal/sciadv
    Nature Communications
    https://www.nature.com/ncomms/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Raging Winds on Mars: Unveiling Martian Weather Patterns
    Unlocking Earth's Deep Past: New Insights into Subduction
    NASA's Artemis II: Preparing for Lunar Exploration
    (00:00) Wind speeds on Mars and their implications
    (12:45) New findings on early Earth's tectonic activity
    (21:15) NASA's Artemis II mission overview
    (30:00) Science report: Octopus handedness and air pollution effects on sleep apnea
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    24 mins
  • Martian Oceans and Lunar Mysteries: Uncovering the Secrets of Our Cosmic Neighbours

    Martian Oceans and Lunar Mysteries: Uncovering the Secrets of Our Cosmic Neighbours
    Oct 15 2025
    In this episode of SpaceTime, we explore groundbreaking discoveries that reshape our understanding of Mars, the Moon, and the Milky Way Galaxy.
    Ancient Oceans on Mars: Geological Evidence Revealed
    A new study published in the journal Geophysical Research Letters presents compelling geological evidence that Mars' Northern Hemisphere was once home to a vast ocean. Lead author Chris from the University of Arkansas discusses how comparisons between river rocks on Earth and Martian sediment reveal ancient river deltas and backwater zones, suggesting that liquid water flowed on the Red Planet, increasing the possibility of past life. This episode delves into the processes of sedimentation and erosion that shaped Mars' landscape, providing insights into its watery past.
    The Moon's South Pole-Aitken Basin: Unveiling Impact Mysteries
    A fresh analysis of the Moon's largest impact crater, the South Pole-Aitken Basin, sheds light on its formation and the Moon's geological history. Researchers have discovered that this massive crater's shape indicates an impact from the north, challenging previous assumptions. As the Artemis missions prepare to land near this basin, they will have the opportunity to study material excavated from the lunar interior, potentially unlocking secrets about the Moon's evolution and the asymmetries in its crust.
    Nancy Chris Roman Space Telescope: Mapping the Milky Way
    NASA's upcoming Nancy Chris Roman Space Telescope is set to revolutionise our understanding of the Milky Way's interstellar medium. This mission will map around 20 billion stars, using infrared light to penetrate the dust clouds obscuring our view. Chief investigator Catherine Zucker explains how this data will refine our models of star formation and the galaxy's structure, while also addressing the ongoing mysteries of galactic spiral patterns and their role in star birth.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Geophysical Research Letters
    https://agupubs.onlinelibrary.wiley.com/journal/19448007
    Nature
    https://www.nature.com/nature
    NASA Nancy Chris Roman Space Telescope
    https://roman.gsfc.nasa.gov/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Ancient Oceans on Mars: Geological Evidence Revealed
    The Moon's South Pole-Aitken Basin: Unveiling Impact Mysteries
    Nancy Chris Roman Space Telescope: Mapping the Milky Way
    (00:00) Evidence of ancient oceans on Mars
    (10:15) New insights into the Moon's largest impact crater
    (19:30) The upcoming Nancy Chris Roman Space Telescope mission
    (27:00) Science Robert: Heatwaves and their impact on global mortality
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    24 mins
  • Hidden Hazards: Unmasking Earth's Threat from Invisible Asteroids

    Hidden Hazards: Unmasking Earth's Threat from Invisible Asteroids
    Oct 14 2025
    In this episode of SpaceTime, we delve into the intriguing world of near-Earth asteroids, the evolution of our universe, and the remarkable discovery of a rogue planet experiencing unprecedented growth.
    Invisible Asteroids Near Venus: A Hidden Threat
    Recent computer simulations published in the journal Astronomy and Astrophysics have raised alarms about a population of near-Earth asteroids that remain undetectable due to their proximity to Venus. These Venusian co-orbital asteroids, which share an orbital resonance with Venus, could pose a collision risk to Earth within a few thousand years. The study's lead author, Valerio Carumba, explains the challenges of observing these asteroids, as they are obscured by the Sun's glare. With a size of around 300 metres, these asteroids could create impact craters several kilometres wide, highlighting the need for dedicated space missions to monitor this potential threat.
    The Universe's Evolution: New Insights from the Epoch of Reionization
    Astronomers have made significant strides in understanding the universe's early days, revealing that it was warmer than previously thought before the first stars ignited. Research based on observations from the Murchison Wide Field Array in Western Australia indicates that the gas between galaxies was heated around 800 million years after the Big Bang, contradicting earlier theories of a cold universe. This heating, likely driven by early X-ray sources, set the stage for the epoch of reionization, which transformed the cosmos from opaque to transparent, allowing light to travel freely.
    A Richie Planet's Remarkable Growth Spurt
    In a groundbreaking discovery, astronomers have identified a rogue planet, catalogued as char 11 oh 7 minus 7626, that is not bound to any star and is growing at an astonishing rate of 6 billion tonnes of gas and dust per second. Located approximately 600 light years away in the constellation Chameleon, this planet challenges conventional notions of planetary stability. Observations reveal that its accretion rate fluctuates dramatically, highlighting the dynamic processes at play in the formation of rogue planets and blurring the lines between planets and stars.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astronomy and Astrophysics
    https://www.aanda.org/
    Astrophysical Journal Letters
    https://iopscience.iop.org/journal/2041-8205
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Invisible Asteroids Near Venus: A Hidden Threat
    The Universe's Evolution: New Insights from the Epoch of Reionization
    A Richie Planet's Remarkable Growth Spurt
    (00:00) The threat posed by invisible asteroids near Venus
    (10:30) New findings on the universe's warm early phase
    (19:00) Discovery of a rogue planet growing at record rates
    (27:15) Science Robert: 2025 Nobel Prize announcements
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    38 mins
  • Dark Stars and Cosmic Origins: Unraveling the Early Universe

    Dark Stars and Cosmic Origins: Unraveling the Early Universe
    Oct 10 2025
    In this episode of SpaceTime, we uncover the latest revelations in astrophysics, including the intriguing prospect of supermassive dark stars, Australia's ambitious lunar rover mission, and fresh insights into the formation of our solar system.
    Supermassive Dark Stars: A New Cosmic Discovery
    Astronomers have identified potential candidates for a new type of star in the early universe, known as supermassive dark stars. Recent observations from the Webb Space Telescope suggest that these stars, primarily composed of hydrogen and helium, are supported against gravitational collapse by dark matter. This episode delves into how these dark stars could help explain the existence of supermassive black holes and the unexpectedly bright distant galaxies observed by Webb. With the possibility of a smoking gun signature in their spectra, the implications of this discovery could reshape our understanding of dark matter and stellar evolution.
    Australia's Lunar Rover Mission: A Step Towards the Moon
    Work is underway on Australia's first lunar rover, set to launch as part of NASA's Artemis programme. This 20-kilogram robotic vehicle, developed by the Queensland University of Technology, will explore lunar geology and contribute to establishing a sustainable human presence on the Moon. The episode covers the rover's design, mission objectives, and the collaborative efforts between Australian institutions and NASA to advance lunar exploration.
    Piecing Together the Early Solar System
    New research published in Science Advances reveals that the early solar system was more chaotic than previously thought, with planets forming from recycled fragments of shattered bodies rather than pristine materials. This episode discusses the violent origins of our solar system and how high-energy collisions influenced the development of planetary cores, ultimately shaping the celestial bodies we know today.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Journal of Physical Review Letters
    https://journals.aps.org/prl/
    Science Advances
    https://www.science.org/journal/sciadv
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Supermassive Dark Stars: A New Cosmic Discovery
    Australia's Lunar Rover Mission: A Step Towards the Moon
    Piecing Together the Early Solar System
    (00:00) The potential discovery of supermassive dark stars
    (10:15) Australia's new lunar rover mission details
    (18:45) New findings on the chaotic origins of the solar system
    (25:30) Skywatch for October: Meteor showers and celestial highlights
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    30 mins
  • Enceladus Unveiled: Fresh Discoveries of Organic Chemistry Beneath the Ice

    Enceladus Unveiled: Fresh Discoveries of Organic Chemistry Beneath the Ice
    Oct 8 2025
    In this episode of SpaceTime, we dive into the fascinating findings from Saturn's icy moon Enceladus, discuss delays in the Dream Chaser spaceplane's launch schedule, and celebrate NASA's breakthroughs in laser communications for deep space missions.
    Enceladus: Unveiling Complex Chemistry
    Recent discoveries reported in the journal Nature Astronomy reveal that Saturn's moon Enceladus is spewing complex organic molecules from its subsurface ocean. Data collected by the Cassini spacecraft during its mission has unveiled fresh insights into the chemical reactions occurring in this hidden ocean. The presence of organic molecules, including precursors for amino acids, raises the possibility that Enceladus may have once harboured conditions suitable for life. This episode explores how these findings could inform future missions aimed at further investigating Enceladus and its potential habitability.
    Dream Chaser Spaceplane: A Delay in Launch
    Sierra Space has announced that their Dream Chaser spaceplane's first free flight demonstration has been pushed back to late 2026. Originally designed as a manned spacecraft, Dream Chaser will now serve as a cargo transport for NASA's Commercial Resupply Services, delivering supplies to the International Space Station. The episode discusses the spaceplane's unique design, its cargo capabilities, and the future of its missions, including plans for a fully operational crewed version.
    Nasa's Optical Deep Space Laser Communications Success
    NASA's new Optical Deep Space Laser Communications project has surpassed all technical goals, paving the way for high-speed communications for future crewed missions to Mars. The technology, which successfully transmitted data over vast distances, demonstrated data rates comparable to broadband Internet services. This breakthrough enables faster communication for astronauts and could revolutionise data transmission in deep space. Tune in to learn more about the technology behind this ambitious project and its implications for future space exploration.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Nature Astronomy
    https://www.nature.com/natureastronomy
    NASA Dream Chaser
    https://www.nasa.gov/dreamchaser
    NASA Optical Deep Space Laser Communications
    https://www.nasa.gov/lasercom
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    Enceladus: Unveiling Complex Chemistry
    Dream Chaser Spaceplane: A Delay in Launch
    NASA's Optical Deep Space Laser Communications Success
    (00:00) The Dream Chaser spaceplane set for another delay
    (00:48) Scientists have discovered new complex organic molecules spewing from Saturn's Enceladus
    (09:41) NASA says new optical Deep Space Laser communications project has exceeded all technical goals
    (17:29) Around a quarter of all press releases in the United States are probably AI generated
    (19:23) Companies failing to secure AI agents is causing security risks, warns expert
    (20:27) Gary Stuart says AI agents can be hacked and should be treated like humans
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    25 mins