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SpaceTime with Stuart Gary

SpaceTime with Stuart Gary

Written by: Stuart Gary
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 Join host Stuart Gary for weekly explorations into Astronomy, Space, and Science News, featuring insights from 19 years on Australian Public Radio and industry experts.

Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-with-stuart-gary--2458531/support.Copyright bitesz.com Astronomy & Space Science Nature & Ecology Science
Episodes
  • Cosmic Echoes and Jovian Secrets: Unraveling the Milky Way's Black Hole and Jupiter's Water Mysteries

    Cosmic Echoes and Jovian Secrets: Unraveling the Milky Way's Black Hole and Jupiter's Water Mysteries
    Jan 30 2026
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    This episode is brought to you with thanks to Squarespace. Bring your stories to life with Squarespace, the easiest way to create an exceptional website, blog, portfolio, or online store. To take up our great offer and help support the show, just visit www.squarespace.com/spacetime or use the Promo Code SPACETIME at checkout.

    SpaceTime with Stuart Gary Gary - Series 29 Episode 13
    In this episode of SpaceTime, we uncover the hidden violent past of the Milky Way's supermassive black hole, delve into the origins of water on Jupiter's Galilean moons, and explore how meteor impacts are triggering dust avalanches on Mars.
    The Violent History of Sagittarius A
    For years, Sagittarius A, the supermassive black hole at the center of our galaxy, has been perceived as a quiet entity. However, new research published in the Astrophysical Journal Letters indicates that it may have experienced dramatic flares in the past. Observations from the CRISM Space Telescope reveal X-ray emissions from a gas cloud near Sagittarius A, suggesting a history of explosive activity that alters our understanding of supermassive black hole evolution and the history of our galaxy.
    Water Origins of Jupiter's Galilean Moons
    A groundbreaking study has determined that the contrasting water content of Jupiter's four large Galilean moons was established during their formation rather than evolving later. This research sheds light on the stark differences between Io, which is dry and volcanically active, and Europa, believed to have a subsurface ocean. The findings suggest that the primordial environment around Jupiter played a crucial role in shaping these moons' compositions.
    Meteor Impacts Trigger Dust Avalanches on Mars
    New evidence indicates that meteor impacts on Mars are causing dust avalanches, creating dark streaks on the planet's surface. An analysis of images from the European Space Agency's ExoMars Trace Gas Orbiter reveals that these avalanches occur primarily due to dry processes, driven by seasonal dust and wind activity, rather than water-related phenomena. This discovery enhances our understanding of Martian surface dynamics and the impact of meteor activity.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astrophysical Journal Letters
    Nature Communications
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    (00:00:00) Sagittarius A's hidden violent past revealed
    (00:12:45) Origins of water on Jupiter's Galilean moons
    (00:25:30) Meteor impacts causing dust avalanches on Mars
    (00:35:00) February night sky highlights and celestial events.
    (00:00:00) This is space time series 29, episode 13 for broadcast on 30 January 2026
    (00:00:47) X ray emissions from the Crism Space Telescope suggest Sagittarius A flared
    (00:07:59) A new study claims dust avalanches caused by meteor impacts are creating Martian streaks
    (00:10:22) February is the second month of the year in the Julian and Gregorian calendars
    (00:12:03) February's Orion meteor showers usually peak around February 8th
    (00:22:18) Blue supergiant Rigel is the second brightest star in the constellation Orion
    (00:31:08) Rygel: Sirius is the brightest star in the night sky
    (00:35:09) February is a great time to look for bright stars in the night sky
    (00:38:04) The night sky is sparse with the old planets at the moment
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    43 mins
  • Earth's Hidden Mantle Secrets: Mars' Blue Past and the Cosmic Gas Pipeline of Galaxy Growth

    Earth's Hidden Mantle Secrets: Mars' Blue Past and the Cosmic Gas Pipeline of Galaxy Growth
    Jan 28 2026
    Sponsor Link:
    This episode is brought to you with thanks to Squarespace. Bring your stories to life with Squarespace, the easiest way to create an exceptional website, blog, portfolio, or online store. To take up our great offer and help support the show, just visit www.squarespace.com/spacetime or use the Promo Code SPACETIME at checkout.

    SpaceTime with Stuart Gary Gary - Series 29 Episode 12
    In this episode of SpaceTime, we uncover groundbreaking discoveries about Earth's mantle, the watery past of Mars, and the rapid growth of galaxies through cool gas filaments.
    Distinct Histories of Earth’s Mantle Provinces
    Recent research reveals that the two massive continent-sized regions deep within the Earth's mantle have unique chemical compositions and histories. This study challenges long-held assumptions and uses seismic wave data to illustrate how these large low velocity provinces differ in density and material, impacting the planet's heat extraction from the core and potentially affecting the stability of Earth's magnetic field.
    Confirmation of Mars as a Blue Planet
    New evidence from ancient Martian river deltas suggests that Mars was once covered by a vast ocean. High-resolution images reveal delta-like structures, indicating that water once flowed into an ocean approximately 3 billion years ago. This discovery supports the notion of a once habitable environment on Mars, offering insights into its geological history and the potential for life.
    Galaxies Growing Through Cool Gas Filaments
    A fascinating new study has demonstrated how galaxies can rapidly grow by drawing in filaments of cool gas. Observations from the Keck Telescope's Cosmic Webb Imager provide direct evidence of these gas streams spiraling into galaxies, fueling star formation at unprecedented rates. This research offers significant insights into the processes of galaxy formation and the role of the cosmic web in shaping the universe.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Scientific Reports
    MPJ Space Exploration
    Nature Astronomy
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    (00:00:00) Distinct histories of Earth's mantle provinces
    (00:12:15) Mars confirmed as a blue planet with ancient ocean
    (00:25:30) Galaxies grow rapidly through cool gas filaments
    (00:35:00) Discovery of the oldest known rock art in the world.
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    25 mins
  • Solar Storms and Lunar Returns: The Artemis 2 Mission and Earth's Record-Breaking Solar Flare

    Solar Storms and Lunar Returns: The Artemis 2 Mission and Earth's Record-Breaking Solar Flare
    Jan 27 2026
    Sponsor Link:
    This episode is brought to you with thanks to Squarespace. Bring your stories to life with Squarespace, the easiest way to create an exceptional website, blog, portfolio, or online store. To take up our great offer and help support the show, just visit www.squarespace.com/spacetime or use the Promo Code SPACETIME at checkout.

    SpaceTime with Stuart Gary Gary - Series 29 Episode 11
    In this episode of SpaceTime, we dive into the latest astronomical events, including a record-setting solar storm impacting Earth, the historic Artemis 2 mission preparing to return astronauts to the Moon, and groundbreaking evidence confirming an ancient asteroid impact in the North Sea.
    Record-Breaking Solar Storm Strikes Earth
    Planet Earth has recently experienced a massive geomagnetic storm triggered by an X1.9 class solar flare, followed by a coronal mass ejection. This event produced stunning auroras, visible as far north as Sydney and Brisbane. We discuss how such solar storms can affect technology on Earth and in space, including potential disruptions to communications and navigation systems, as well as the impact on satellites in low Earth orbit.
    Artemis 2: A Historic Return to the Moon
    NASA's Artemis 2 mission is gearing up to send astronauts back to the Moon for the first time in over 50 years. The crew will embark on a 10-day journey, orbiting the Moon and traveling further than any humans have before. We explore the mission's objectives, including testing spacecraft systems, practicing docking procedures, and conducting deep space science experiments, all while preparing for future lunar landings.
    Proof of an Ancient Asteroid Impact
    A decades-long debate over the origins of the Silverpit Crater in the North Sea has been resolved with new evidence confirming it was formed by an asteroid impact 43 to 46 million years ago. Utilizing seismic imaging and microscopic analysis, researchers have established this crater as a significant impact site, shedding light on the history of asteroid collisions on Earth and their implications for our planet's geological evolution.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Nature Communications
    NASA Reports
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-your-guide-to-space-astronomy--2458531/support.
    (00:00:00) Record solar storm strikes Earth
    (00:12:30) Artemis 2 mission prepares to send astronauts back to the Moon
    (00:25:00) Evidence confirms asteroid impact in the North Sea
    (00:35:15) New insights into Earth's climate from ancient geological events.
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    27 mins
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