SpaceTime with Stuart Gary

SpaceTime Series 28 Episode 02 Liquid Water on Mars: A Mirage? A new study casts doubt on the existence of liquid water on Mars, challenging previous assumptions about recurring slope lineae and the potential for brine pools. Researchers argue that the Martian environment's low temperature and pressure make it unlikely for liquid water to exist, even in the form of salty brines. The findings quest...

SpaceTime Series 28 Episode 01 Webb Telescope Confirms Hubble Tension The James Webb Space Telescope has confirmed the Hubble Tension, challenging the current understanding of cosmic theory. New observations reveal that the Universe is expanding faster now than during its early years, suggesting gaps in our understanding of cosmic physics. The study, led by Adam Rees and Thomas Barber, confirms th...

SpaceTime Series 27 Episode 157 NASA's Parker Solar Probe Touches the Sun NASA's Parker Solar Probe has made history by becoming the first spacecraft to touch the Sun. The probe, weighing 685 kilogrammes, flew within 6.1 million kilometres of the solar surface, achieving unprecedented speeds of over 692 kilometres per hour. This milestone marks a significant step in understanding solar phenomena a...

SpaceTime Series 27 Episode 156 Superflares: A Century-Long Threat? A new study warns of the potential for our Sun to unleash superflares, with the threat estimated at once per century. These massive eruptions could engulf the Earth, challenging our understanding of solar behaviour. Evidence from other sun-like stars suggests that such violent solar events may be more common than previously though...

SpaceTime Series 27 Episode 155 *Discovery of a New Class of Cosmic X-Ray Astronomers have identified a new class of cosmic X-ray source, potentially originating from a novel type of nova event. The study, published in the Astrophysical Journal Letters, reveals 29 unusual objects in the Large and Small Magellanic Clouds. These objects displayed unexpected behaviours, such as long-duration X-ray ou...

SpaceTime Series 27 Episode 154 * The Moon's Age: A New Perspectiv e New research suggests the Moon may be much older than previously believed. Evidence indicates the Moon's crust underwent extensive remelting around 4.35 billion years ago, obscuring its true age. This study proposes the Moon could be as old as 4.53 billion years, challenging past estimates and offering a new understanding of its...

SpaceTime Series 27 Episode 153 * The Mysterious Origins of Martian Minerals A new study suggests that some Martian minerals may have formed in liquid carbon dioxide rather than water. While traditional views link Mars' dry river channels to past water presence, this research indicates that under ancient Martian conditions, liquid CO2 could have been a significant factor in shaping the planet's ge...

SpaceTime Series 27 Episode 152 * Martian Dust Storms: A New Understanding A groundbreaking study reveals the triggers behind Mars' infamous planet-wide dust storms. Researchers from the University of Colorado Boulder suggest that relatively warm and sunny days could initiate these massive storms. Presented at the American Geophysical Union's 2024 meeting, the findings could pave the way for forec...

SpaceTime Series 27 Episode 151 * A New Perspective on the Moon's Aitken Basin Recent observations of the Moon's south pole reveal that the Aitken Basin crater is more circular than previously believed. This significant discovery challenges existing theories about its formation and has implications for future lunar missions, including NASA's Artemis program. The study, published in Earth and Plane...

SpaceTime Series 27 Episode 150 * Venus: A Lifeless World New research has debunked the long-standing theory that Venusmight have once been habitable. Despite being Earth's sister planet, a study of its atmospheric chemistry reveals that Venus has always been too dry to support oceans, making it an inhospitable world throughout its history. These findings, published in Nature Astronomy, have signi...

SpaceTime Series 27 Episode 149 * Did Earth's Oceans Come from Comets? New research suggests that Earth's oceans may have originated from comets, reigniting the debate about the origins of Earth's water. Recent observations of Comet 67P reveal a similar molecular signature to Earth's oceans, challenging previous findings and suggesting Jupiter family comets could have contributed to Earth's water...

SpaceTime Series 27 Episode 148 * Another Delay for NASA's Artemis Moon Mission NASA has announced a delay in the launch of its Artemis 2 manned Moon mission, now rescheduled for April 2026. Originally planned for September 2025, the delay is due to concerns about the Orion spacecraft's heat shield. This postponement also affects the timeline for Artemis 3, which aims to return humans to the lunar...

SpaceTime Series 27 Episode 147 * A Cosmic Glimpse into the Universe's Past Astronomers have witnessed a rare supernova, 2023 UFX, offering insights into the early universe. This unusual stellar explosion involved a metal-poor red supergiant star, providing clues about the cosmic conditions when the universe began. The study, led by Michael Tucker from Ohio State University, reveals how early supe...

SpaceTime Series 27 Episode 146 * Supernova's Potential to End the Dark Matter Search Astronomers are eagerly awaiting a nearby supernova that could finally solve the mystery of dark matter. A new study suggests that axions, hypothetical particles, could be discovered within seconds of a supernova's gamma-ray burst. The Fermi Gamma Ray Space Telescope might detect these gamma rays, offering insigh...

SpaceTime Series 27 Episode 145 * Unveiling the Mysteries of Uranus and Neptune A new study reveals that Uranus and Neptune, the ice giants of our solar system, may have layered interiors composed of water, methane, and ammonia, similar to oil and water that do not mix. This discovery could explain their unique magnetic fields, previously a mystery to scientists. The research, led by Burkhard Milt...

SpaceTime Series 27 Episode 144 * Young Exoplanet Challenges Planet Formation Theories Astronomers have discovered an exoplanet, Taade 1b, that is just 3 million years old, challenging our current understanding of the speed at which planets form. This young planet, orbiting its star every seven Earth days, offers a unique glimpse into the early stages of planetary formation. The study, led by Madi...

SpaceTime Series 27 Episode 143 * The Milky Way: An Unusual Galaxy A new study reveals that our Milky Way galaxy is an outlier among similar galaxies, challenging the assumption that it is a typical model for understanding galactic formation and evolution. Published in the Astrophysical Journal, the research highlights differences in the Milky Way's evolutionary history compared to other galaxies...

SpaceTime Series 27 Episode 142 * How Mars Got Its Moons A groundbreaking study suggests that Mars acquired its moons, Phobos and Deimos, after a passing asteroid was torn apart by the planet's gravity. This new hypothesis, based on NASA's supercomputer simulations and published in the journal Icarus, challenges previous theories of their origin, such as capture or major impact. The upcoming Marti...

SpaceTime Series 27 Episode 141 * Supermassive Black Hole Consumes Matter at Record Speed Astronomers have discovered a supermassive black hole in the early universe consuming matter at a rate more than 40 times its theoretical limit. This black hole, catalogued as LID568, was observed by the Webb Space Telescope and is providing new insights into the rapid growth mechanisms of black holes shortly...

SpaceTime Series 27 Episode 140 *Revisiting the Milky Way's Black Hole Image A new study questions the accuracy of the first-ever image of Sagittarius A, the supermassive black hole at the centre of the Milky Way. Researchers suggest the image may not accurately represent its appearance, proposing a more elongated accretion disc instead of the ring-like structure previously released by the Event H...

SpaceTime Series 27 Episode 139 *Gilmore Space Cleared for Orbital Launch The Australian Space Agency has granted Gilmore Space the final approval needed to conduct its maiden orbital test flight of the Ares rocket from the Bowen Spaceport in North Queensland. This launch will mark the first orbital test flight of an Australian-made rocket from Australian soil, showcasing a new hybrid propulsion s...

SpaceTime Series 27 Episode 138 * Discovery of the Outer Solar System's Magnetic Field Scientists have discovered evidence of an ancient magnetic field at the far reaches of our solar system. Research published in AGU Advances, based on 4.6 billion-year-old grain samples from the asteroid Richie, suggests the presence of a weak magnetic field during the formation of the outer solar system. This fi...

SpaceTime Series 27 Episode 137 *The Earth: A Giant Slushie? New research reveals that Earth once experienced a "slushy" period following its snowball Earth phase. Published in the Proceedings of the National Academy of Sciences, the study by Virginia Tech scientists suggests that as the planet thawed, it transitioned into a slushy state, marked by high carbon dioxide levels and rapid melting. The...

SpaceTime Series 27 Episode 136 *Discovering the Origins of Magnetars A groundbreaking study reveals that magnetars, highly magnetic neutron stars, are born from stellar mergers rather than single star supernova events. These findings, published in Nature, delve into the origins of fast radio bursts (FRBs), which are high-energy flashes releasing more energy in nanoseconds than half a billion suns...

SpaceTime Series 27 Episode 135 *Could Uranus Moon Miranda Have a Subsurface Ocean? A new study suggests that Uranus' moon Miranda may harbour a liquid water ocean beneath its peculiar jigsaw-like surface. The findings, published in the Planetary Science Journal, challenge existing assumptions about Miranda's history and composition, potentially placing it among the select few worlds in our solar...