Episódios

  • MOND vs. Dark Matter: A New Perspective on Cosmic Mysteries

    MOND vs. Dark Matter: A New Perspective on Cosmic Mysteries
    Jun 6 2025
    Sponsor Details:
    This episode is brought to you with the support of Insta360 - the leaders in 360-degree video technology. To explore their innovative range and claim your special SpaceTime bonus, visit store.insta360.com and use the coupon code SpaceTime at checkout.

    In this episode of SpaceTime, we uncover exciting new research challenging our understanding of dark matter, reveal hidden treasures beneath the Earth's surface, and explore the potential for life on Titan, Saturn's enigmatic moon.
    Modified Newtonian Dynamics: A Dark Matter Alternative
    Recent studies suggest that modified Newtonian dynamics (MOND) may serve as a viable alternative to the elusive dark matter hypothesis. This theory, proposed by physicist Mordecai Milgrom, modifies Newton's laws to explain the gravitational behavior observed in galaxies without relying on dark matter. We delve into the latest findings that support MOND, including a novel method for measuring gravity in wide binary star systems, which indicates that gravity may actually be stronger than Newton's predictions under certain conditions.
    Earth's Hidden Gold Reserves
    A groundbreaking study reveals that Earth's core may contain vast reserves of gold and other precious metals, far beyond what is accessible on the surface. Researchers discovered traces of ruthenium in volcanic rocks from Hawaii, suggesting that these metals originated from the core and are leaking into the mantle. This research opens new avenues for understanding Earth's internal dynamics and the movement of materials from the core to the surface.
    Searching for Life's Chemistry on Titan
    NASA's upcoming Dragonfly mission aims to investigate the intriguing chemistry of life on Titan, Saturn's largest moon. With its organic-rich environment and unique geological features, Titan presents an opportunity to study prebiotic chemistry in a way that Earth cannot. We explore how Dragonfly will analyze the moon's surface and atmosphere to uncover clues about the processes that may have led to the emergence of life, potentially reshaping our understanding of habitability in the universe.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astrophysical Journal
    https://iopscience.iop.org/journal/0004-637X
    Nature
    https://www.nature.com/nature/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 68 for broadcast on 6 June 2025
    01:00 Modified Newtonian dynamics as an alternative to dark matter
    12:15 Earth's hidden gold reserves
    22:30 Searching for life's chemistry on Titan
    30:00 Science report: Ancient tool-making from whale bones and quantum computing breakthroughs
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    24 minutos
  • SpaceX's Starship 9: A Journey Through Triumph and Turmoil

    SpaceX's Starship 9: A Journey Through Triumph and Turmoil
    Jun 4 2025
    Sponsor Details:
    Incogni: When your data privacy matters, you need Incogni. To get your special SpaceTime deal and bonuses, visit www.incogni.com/stuartgary and let them do all the heavy lifting for you
    Insta360
    This episode is brought to you with the support of Insta360 - the innovators in 360-degree camera technology. Capture your adventures with the Insta360 X5, designed for extreme conditions. To claim a free invisible selfie stick with your purchase, visit store.insta360.com and use the promo code SpaceTime!

    In this episode of SpaceTime, we explore the latest developments in space exploration, lunar geology, and solar phenomena.
    SpaceX's Fiery Ninth Starship Test Flight
    The latest test flight of SpaceX's Starship ended dramatically as both the orbiter and the booster were destroyed during reentry. Despite the fiery conclusion, SpaceX officials noted that the test was designed to push the limits of the spacecraft. The flight featured numerous milestones, including a successful hot staging and the first reflight of a booster. However, issues arose during the landing burn, resulting in a spectacular explosion. We discuss the implications of this test and what it means for future missions, including NASA's Artemis 3.
    Lunar Rocks and Their Magnetic Mystery
    A new study proposes that a significant asteroid impact may explain the presence of highly magnetic rocks on the Moon. Researchers suggest that a brief amplification of the Moon's weak magnetic field, caused by a large plasma-generated impact event, could account for the magnetism observed in some lunar samples. This hypothesis sheds light on the Moon's geological history and its magnetic properties, particularly in regions near the lunar south pole, where future missions are planned.
    Revealing the Sun's Corona
    Astronomers have captured unprecedented details of the Sun's corona using a new adaptive optics system. This groundbreaking technology has allowed scientists to produce the clearest images of the corona yet, enhancing our understanding of coronal heating and solar eruptions. The new observations reveal dynamic features and turbulent flows within the corona, providing insights into the mechanisms driving space weather and its effects on Earth.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Nature Astronomy
    https://www.nature.com/natureastronomy/
    Science Advances
    https://www.science.org/journal/sciadv
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 67 for broadcast on 4 June 2025
    01:00 SpaceX's ninth Starship test flight
    12:15 Lunar rocks and their magnetic mystery
    22:30 Revealing the Sun's corona
    30:00 Science report: New methods for green hydrogen production
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    33 minutos
  • Unraveling the Hubble Constant: A New Era of Cosmic Understanding

    Unraveling the Hubble Constant: A New Era of Cosmic Understanding
    Jun 2 2025
    Sponsor Details:
    This episode is brought to you with the support of Insta360 - the pioneers in 360-degree video technology. To explore their innovative range and claim your special offer, visit store.insta360.com and use the coupon code SpaceTime at checkout.

    In this episode of SpaceTime, we tackle some of the universe's most pressing mysteries, including new insights into the Hubble constant, the surprising geology of Venus, and the building blocks of stellar formation.
    Resolving the Hubble Constant Debate
    New data from the James Webb Space Telescope may have finally reconciled the long-standing discrepancy in the measurement of the Hubble constant, the rate at which the universe expands. For years, scientists have grappled with differing values derived from cosmic microwave background radiation and supernova observations. Lead author Wendy Friedman discusses how recent findings suggest that the standard model of cosmology holds up, with the Hubble constant now estimated at 70.4 kilometres per second per megaparsec, aligning more closely with earlier measurements. This breakthrough could reshape our understanding of the universe’s expansion and evolution.
    Venus's Thin Crust
    New research indicates that Venus's crust is unexpectedly thin, challenging previous assumptions about the planet's geology. A study published in Nature Communications reveals that Venus lacks the tectonic activity seen on Earth, resulting in a crust that is about 40 to 65 kilometres thick. This research proposes a model of crust metamorphism that could explain how volcanic activity persists on Venus, despite the absence of plate tectonics. Upcoming missions, including NASA's Davinci and Veritas, aim to gather more data that could confirm these findings and enhance our understanding of Venus's geological processes.
    Building Blocks of Stellar Formation
    A recent study highlights that the formation of stars is influenced not only by the amount of gas in a galaxy but also by its distribution. Observations from the Philip Survey, conducted using the Australian Square Kilometre Array Pathfinder Telescope, reveal that star formation is concentrated in areas with higher gas density. Lead author Siona Lee explains how this research sheds light on the intricate processes that govern star formation, suggesting that gas location is critical for the birth of new stars across various galaxy types.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Astrophysical Journal
    https://iopscience.iop.org/journal/0004-637X
    Nature Communications
    https://www.nature.com/naturecommunications/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 66 for broadcast on 2 June 2025
    01:00 Resolving the Hubble constant debate
    12:15 Venus's surprisingly thin crust
    22:30 Building blocks of stellar formation
    30:00 Science report: New links between autism and Parkinson's disease
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    25 minutos
  • Gravity's New Dawn: The Quest for a Unified Theory

    Gravity's New Dawn: The Quest for a Unified Theory
    May 30 2025
    Sponsor Details:
    This episode is brought to you with the support of Insta360 - the leaders in 360 degree video. To check out the range and grab your special SpaceTime bonus, visit store.insta360.com and use the coupon code SpaceTime at checkout.

    In this episode of SpaceTime, we delve into groundbreaking advancements in our understanding of gravity, the intriguing thermal characteristics of the Moon, and the discovery of white dwarf pulsars.
    A New Theory of Gravity
    Scientists have proposed a revolutionary new theory of gravity that brings us closer to the long-sought theory of everything. This quantum theory of gravity aims to unify gravity with the fundamental forces of nature, offering potential solutions to some of the most profound questions in physics, including the nature of dark matter and dark energy. We explore the implications of this theory and how it could reshape our understanding of the universe's origins and the behavior of black holes.
    The Moon's Hot Side
    Recent findings suggest that the Moon's near side is significantly hotter than its far side, with temperatures reaching up to 170 degrees Celsius higher. This research, based on data from NASA's GRAIL mission, reveals how geological differences between the lunar sides could be attributed to thermal variations in the Moon's mantle. We discuss the potential for these methods to enhance our understanding of other celestial bodies, including Mars and the moons of Jupiter and Saturn.
    White Dwarf Pulsars: A Stellar Discovery
    Astronomers have made a remarkable discovery of a white dwarf star that emits radio pulses, challenging the notion that only neutron stars can produce such signals. This discovery, reported in Nature Astronomy, opens up new avenues for understanding pulsar mechanisms and their sources across the Milky Way. We examine the significance of this finding and what it means for our knowledge of stellar evolution.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Reports on Progress in Physics
    https://iopscience.iop.org/journal/0034-4885
    Nature
    https://www.nature.com/nature/
    Nature Astronomy
    https://www.nature.com/natureastronomy/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 65 for broadcast on 30 May 2025
    01:00 New theory of gravity
    12:15 The Moon's thermal characteristics
    22:30 Discovery of white dwarf pulsars
    30:00 Skywatch: June night skies and the Taurids meteor shower
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    51 minutos
  • Jupiter's Gigantic Past

    Jupiter's Gigantic Past
    May 28 2025
    Sponsor Details:
    This episode is brought to you with the support of Insta360 - the game changer in 360-degree camera technology. Capture stunning moments with the Insta360 X5, which records 8K 360-degree video. To bag a free invisible selfie stick with your purchase, head to store.insta360.com and use the promo code SpaceTime!

    In this episode of SpaceTime, we uncover remarkable revelations about Jupiter, lightning-induced gamma rays, and groundbreaking achievements in spaceflight.
    Jupiter's Magnificent Past
    A new study reveals that Jupiter, the solar system's largest planet, was once twice its current size and possessed a magnetic field 50 times stronger than today. Researchers, led by Konstantin Batygin, used the orbits of Jupiter's small moons, Amalthea and Thebe, to deduce these findings, providing critical insights into the early stages of planetary formation. The implications of this research could reshape our understanding of gas giants and their formation processes across the universe.
    Gamma Rays and Lightning
    In a groundbreaking discovery, scientists have detected intense flashes of gamma rays produced by lightning strikes. This phenomenon, known as terrestrial gamma ray flashes, occurs when lightning accelerates electrons to near light speeds, resulting in bursts of radiation. The study, published in Science Advances, sheds light on the high-energy processes occurring in Earth's atmosphere, enhancing our understanding of lightning's power and its effects on our planet.
    Precision Formation Flying in Space
    History has been made in Earth orbit as two spacecraft from the European Space Agency's Proba 3 mission successfully flew in millimeter-perfect formation for the first time. This precision alignment is crucial for studying the Sun's corona, allowing the two satellites to simulate a single large spacecraft. We discuss the technology behind this mission and its potential to revolutionize solar observations.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Nature Astronomy
    https://www.nature.com/natureastronomy/
    Science Advances
    https://www.science.org/journal/sciadv
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 64 for broadcast on 28 May 2025
    01:00 Jupiter's original size and magnetic field
    12:15 Gamma ray flashes unleashed by lightning
    22:30 Precision formation flying in space
    30:00 Science report: New contact lens technology for night vision
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    23 minutos
  • The Universe's Surprising Expiration Date

    The Universe's Surprising Expiration Date
    May 27 2025
    Sponsor Details:
    This episode is brought to you with the support of Insta360 - for incredible 360 degree videos you really need to check their cameras out. To see the range and claim your free offer, visit store.insta360.com and use the coupon code SpaceTime at checkout.

    In this episode of SpaceTime, we explore some mind-bending revelations about the universe, including a new estimate for its ultimate fate, the peculiar gravity of the asteroid Bennu, and India's ambitious plans for its first manned spaceflight.
    The Universe's Unexpected Expiration Date
    A groundbreaking study suggests that the universe could meet its end in a mere 10^78 years, significantly sooner than the previously estimated 10^1100 years. This revelation, based on calculations involving Hawking radiation, sheds light on how black holes and other celestial bodies lose mass over time. We discuss the implications of this research and the fascinating mechanics behind black hole evaporation, including the surprising equivalence in decay rates between neutron stars and black holes.
    Gravity's Quirks on Asteroid Bennu
    Astronomers have uncovered bizarre gravitational dynamics at play on the near-Earth asteroid Bennu, based on data from NASA's Osiris Rex mission. This small celestial body exists in a delicate balance between gravity and centrifugal forces, creating a unique environment that could lead to its eventual disintegration. We delve into how Bennu's increasing rotation might impact its structural integrity and potential future interactions with Earth.
    India's Manned Spaceflight Ambitions
    The Indian Space Research Organization (ISRO) has announced plans for its first manned spaceflight, set to launch in early 2027. This historic mission will follow an unmanned test flight of the Gaganyan spacecraft, which is designed to carry a crew into low Earth orbit. We discuss the training and preparations of the selected Indian Air Force pilots and the technical challenges ISRO faces as it embarks on this new frontier in space exploration.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Journal of Cosmology and Astroparticle Physics
    https://www.cosmos.esa.int/cosmology
    Nature Astronomy
    https://www.nature.com/natastronomy/
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 63 for broadcast on 26 May 2025
    01:00 New estimates on the universe's end
    12:30 The strange gravity of asteroid Bennu
    22:45 India's plans for its first manned spaceflight
    30:00 Science report: Herpes virus linked to Alzheimer's disease
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    21 minutos
  • Unraveling Dark Matter's Origins, Mars' Stunning Aurora Discovery, and New X-Ray Mysteries

    Unraveling Dark Matter's Origins, Mars' Stunning Aurora Discovery, and New X-Ray Mysteries
    May 23 2025
    Sponsor Details:
    This episode is brought to with the support of NordVPN....the official VPN service of SpaceTime. To check out your special SpaceTime discount with 30 day money back guarantee, visit www.nordvpn.com/stuartgary or use the coupon code STUARTGARY at checkout.

    This episode of SpaceTime delves into groundbreaking discoveries and theories that reshape our understanding of the universe, including the origins of dark matter, the first visible light auroras on Mars, and new insights into massive X-ray explosions near supermassive black holes.
    The Birth of Dark Matter Explained
    A new hypothesis suggests that dark matter, which constitutes about 85% of the universe's mass, may have originated from massless particles that condensed as they slowed down. This theory, outlined in the journal Physical Review Letters, proposes that these particles formed during the early universe's chaotic conditions, akin to steam turning into water. We discuss how this model could be tested using existing cosmic microwave background radiation data, potentially revolutionizing our understanding of dark matter's properties and formation.
    Visible Light Auroras on Mars
    In a historic achievement, NASA's Perseverance rover has captured the first visible light auroras on Mars, confirming long-held theories about Martian atmospheric phenomena. This event, triggered by a massive solar flare, opens up new avenues for auroral research and suggests that future astronauts could witness these stunning displays on the Martian surface. We explore the implications of this discovery and how it enhances our understanding of solar interactions with planetary atmospheres.
    Quasiperiodic Eruptions: A New Type of X-ray Explosion
    Astronomers have identified a new type of X-ray outburst known as quasiperiodic eruptions, occurring near supermassive black holes. Observed in a galaxy 300 million light-years away, these eruptions exhibit a unique pattern, with events occurring every 4.5 days. We discuss the mechanisms behind these eruptions and their significance in understanding the dynamics of black holes and their surrounding environments.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Physical Review Letters
    https://journals.aps.org/prl/
    Science Advances
    https://www.science.org/journal/sciadv
    Astrophysical Journal
    https://iopscience.iop.org/journal/0004-637X
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 This is Space Time Series 28, Episode 62 for broadcast on 23 May 2025
    01:00 New theory explaining the birth of dark matter
    12:15 First visible light auroras detected on Mars
    20:30 Discovery of quasiperiodic eruptions near supermassive black holes
    30:00 Science report: AI chatbots exaggerate research summaries
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    23 minutos
  • Solar Flare Frenzy: Earth's Brush with the Biggest Geomagnetic Storm in 20 Years

    Solar Flare Frenzy: Earth's Brush with the Biggest Geomagnetic Storm in 20 Years
    May 21 2025
    This episode of SpaceTime explores the recent surge in solar activity, including the largest solar flare of the year and the most intense geomagnetic storm in two decades.Massive Solar Flare and Its Implications
    We delve into the details of a powerful X 2.7 class solar flare that erupted from a newly active sunspot region, AR14087. Although the flare was not initially directed towards Earth, its rotation has now positioned it directly in our path. We discuss the mechanics of solar flares, their classification, and the potential impacts of such events on our planet, including disruptions to communication systems, satellite operations, and even power grids.The Gannon Storm: A Historic Geomagnetic Event
    The episode highlights the Gannon Storm, a severe geomagnetic storm that struck Earth on May 10, 2024. Coinciding with a space weather exercise, this event caused significant disruptions, including high voltage power line failures and rerouted flights due to radiation exposure. We analyze its effects on the atmosphere, satellites, and even the ionosphere, revealing insights into how such storms can impact modern technology.Ancient Solar Storms and Their Modern Implications
    In a fascinating segment, we discuss a groundbreaking study that identifies the strongest solar storm ever recorded, dating back to 12350 BCE. This ancient event, significantly more intense than any modern storm, provides invaluable data for understanding solar activity and its potential risks to contemporary infrastructure.Science Robert: Long Work Hours and Brain Changes
    We also touch on a new study revealing how long working hours could alter brain structures, potentially affecting memory and emotional regulation.Join us as we unpack these cosmic phenomena and their implications for life on Earth and beyond.
    www.spacetimewithstuartgary.com
    ✍️ Episode References
    Journal of Occupational Environmental Medicine
    https://journals.lww.com/joem/Pages/default.aspx
    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
    00:00 Solar flares are powerful blasts of energy erupting from sunspots
    10:30 May 2024 was the biggest geomagnetic storm in over 20 years
    14:29 New study reveals strongest solar event ever recorded, rewriting science on space weather
    18:23 A new study claims people who work long hours could have altered brain structures
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    23 minutos