Sept. 4, 2024
S03E145: Spaceflight Health Discoveries, BepiColombo's New Route, and Ganymede's Titanic Collision
Astronomy Daily - The Podcast: 4th September 2024
Welcome to another episode of Astronomy Daily, your go-to source for the latest in space and Astronomy news. I'm your host, Anna, and today we have some fascinating stories to delve into, from...
Astronomy Daily - The Podcast: 4th September 2024
Welcome to another episode of Astronomy Daily, your go-to source for the latest in space and Astronomy news. I'm your host, Anna, and today we have some fascinating stories to delve into, from groundbreaking research uncovering how spaceflight affects human physiology to the thruster issues delaying the BepiColombo spacecraft's journey to Mercury. We also have the intriguing tale of a peculiar noise heard on NASA's Starliner and a look at how a titanic asteroid impact reshaped Jupiter's moon Ganymede. So sit back, relax, and let's explore the cosmos together.
Highlights:
- Spaceflight and Human Physiology: Recent research has shed light on how spaceflight extensively alters the gut microbiome, a bustling community of bacteria essential for digestion and immune function. Led by researchers from University College Dublin and McGill University in collaboration with NASA, the study revealed significant shifts in specific bacteria, affecting gene expression related to immune and metabolic functions. These findings have profound implications for astronaut health during long-duration missions and could also benefit health protocols here on Earth.
- BepiColombo's Thruster Issues: The European-Japanese BepiColombo spacecraft has faced thruster issues, delaying its arrival at Mercury until 2026. Launched in 2018, BepiColombo needs to follow a complex route involving multiple flybys. However, a glitch in the spacecraft's thrusters has led to inadequate thrust. Engineers have revised the spacecraft's trajectory, allowing it to still achieve its scientific objectives despite the delay.
- Peculiar Noise on NASA's Starliner: Astronaut Butch Wilmore reported hearing a strange pulsing noise from Boeing's Starliner spacecraft docked to the ISS. NASA explained that the noise originated from feedback in the audio configuration between Starliner and the ISS. This issue had no technical impact on the crew or the spacecraft's operations.
- Titanic Asteroid Impact on Ganymede: Research led by a planetologist from Kobe University has revealed that an asteroid impact around 4 billion years ago reshaped Jupiter's moon Ganymede. The impact was so colossal that it altered not just Ganymede's surface but potentially its rotation as well. This ancient event provides invaluable insights into the early solar system's dynamics and the moon's geological history.
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WEBVTT
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Welcome listeners to another episode of Astronomy Daily, your go
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to source for the latest in space and astronomy news.
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I'm your host, Anna, and today we have some fascinating
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stories to delve into. From groundbreaking research uncovering how spaceflight
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affects human physiology to the thruster issues delaying the BEPI
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Columbo spacecraft's journey to Mercury. We also have the intriguing
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tale of a peculiar noise heard on NASA's Starliner, and
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a look at how a Titanic asteroid impact reshaped Jupiter's
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moon Ganymede. So sit back, relax, and let's explore the
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Cosmos together.
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Let's start today with astronauts and health.
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Space travel has always been a frontier filled with mystery
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and discovery. But what about the mysteries that unravel inside
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the human body during spaceflight. Recent research has shed some
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light on this fascinating subject, and the findings could be
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game changing for future long duration missions. Let's start with
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the gut microbiome, a bustling community of bacteria residing within us,
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essential for everything from digestion to immune function. Well, it
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turns out that spaceflight extensively altered this internal ecosystem. Researchers
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from University College Dublin and McGill University led an international
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team in collaboration with NASA to explore these changes. The study,
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published in NPG Biofilms and Microbiomes, dive deep into genetic
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analyzes to understand how space travel impacts the gut microbiome,
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and the results are nothing short of extraordinary. The researchers
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used advanced genetic technologies to examine the gut microbiomes of
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mice aboard the International Space Station over three months. Their
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findings revealed significant shifts in specific bacteria, which in turn
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affected gene expression related to immune and metabolic functions. This
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isn't just about gut health. These shifts have profound implications
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for overall astronaut physiology. Spaceflight extensively alters astronaut physiology, said
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doctor Emmanuel Gonzalez of McGill University and the studies first author.
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The results showed previously unknown effects on host physiology, a
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crucial piece in solving the spaceflight puzzle. Essentially, it's not
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just the humans and animals that make the journey to space,
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its entire ecosystems traveling with us ecosystems whose well being
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might be just as critical as the astronauts. One of
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the key discoveries was how these changes in the gut
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microbiome affect bile, acid, and cholesterol metabolism, vital elements that
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play roles in maintaining energy and metabolic balance. Such insights
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are indispensable for designing protocols to safeguard astronaut health during
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missions to the Moon, Mars, and beyond. This groundbreaking research
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was part of a larger initiative by NASA's Gene Lab.
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The international collaboration saw contributions from an array of scientists
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and institutions, highlighting the importance of cooperative open science the
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goal accelerate discoveries and turn complexities into actionable findings. Jonathan Galaska,
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a Space Biology Portfolio scientist at NASA's AIMS Research Center,
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emphasized how such collaborative efforts can speed up our understanding
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of spaceflight impacts. But it's not just about safeguarding astronaut
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health for distant missions. These findings have significant implications for
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improving health right here on Earth. Stressful environments can disrupt
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the delicate symbiosis between humans and their gut bacteria, leading
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to various health issues. By studying these disruptions in space,
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researchers hope to devise better health protocols that could benefit everyone.
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Professor Nicholas Breton of the UCD School of Biology and
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Environmental Science describe the discoveries as highlighting the intricate dialogue
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between specific gut bacteria and their mouse hosts. Essentially, the
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study lays the groundwork for future space medicine while offering
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insights that could extend to earth bound medical care. Looking ahead,
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the knowledge gained from this research is set to support
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missions like NASA's Artemis program, which aims to put humans
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back on the Moon, and the Gateway Deep Space Station.
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As we set our sites on Mars, understanding these microbial
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shifts and their physiological.
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Impacts becomes paramount. So what does this mean for the future.
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Imagine astronauts on a mission to Mars equipped with personal
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health protocols based on their unique gut microbiomes. Insights from
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this study could help develop such tailored strategies, ensuring that
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the men and women who undertake these epic journeys are
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as prepared as possible. In summary, the research unveils the
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multi layered impacts of spaceflight on the gut microbiome, providing
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invaluable information for future long duration missions. It's a remarkable
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step forward, illustrating how our ever expanding knowledge of space
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can circle back to benefit life on Earth as well.
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Next up on Astronomy Daily, let's talk about the thruster
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issues faced by the European Japanese Bepy Columbo spacecraft, which
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has led to a delay in its arrival at Mercury
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until twenty twenty six. This story has a lot of
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intriguing engineering and problem solving elements that highlight the complexities
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of space exploration. Bp Colombo, a joint mission between the
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European Space Agency ESA and the japan Aerospace Exploration Agency JAXA,
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launched back in twenty eighteen with the ambitious goal of
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exploring Mercury and unlocking some of its many mysteries. The
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spacecraft needs to follow a highly complex and circuitous route
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to reach Mercury, involving multiple flybys of Earth, Venus, and
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Mercury itself. The plan was for Bepy Colombo to use
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its thrusters for these maneuvers, but earlier this year in April,
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engineers encountered a hitch a glitch affected the spacecraft's thrusters,
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causing them not to operate at full power. This malfunction
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was related to unexpected electric currents between the Mercury Transfer
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Module MTM solar array and the power extraction and distribution unit. Essentially,
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the setup designed to manage and distribute power throughout the
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spacecraft wasn't functioning as intended, resulting in inadequate thrust. After
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months of intensive investigations, ESS mission manager Santa Martinez confirmed
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the troubling news the mtm's electric thrusters were irrevocably compromised
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and would not meet the thrust requirements needed for the
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planned insertion into Mercury's orbit in December twenty twenty five. However,
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engineers are nothing if not resilient. Despite this significant setback,
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they quickly got to work on a solution. ESA's flight
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dynamics team came up with a viable workaround to ensure
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the mission could still achieve its primary goals. They revised
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the spacecraft's trajectory, calculating a new path that would conserve
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the remaining thrust while still allowing BEPI Colombo to meet
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its scientific objectives. The ingenious new plan involves having BEPI
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Columbo fly approximately twenty two miles closer to Mercury during
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its fifth flyby than originally planned. This maneuver reduces the
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thrust requirements for subsequent flybys and sets the spacecraft on
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a course that will enable it to arrive at Mercury
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in November twenty twenty six, about a year later than
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initially planned. Despite this delay, the mission remains poised for success.
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BEPY Columbo is equipped with an impressive suite of sixteen
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scientific instruments distributed across two orbiters, developed separately by ESA
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and JACKSA. Once they arrived, the two orbiters will separate
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and begin their respective tasks studying Mercury's magnetic field, surface,
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and exosphere for at least one year, with a possibility
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of extending to a second year. Project scientist Johannes Bankoff
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emphasized the silver lining the new trajectory still allows the
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spacecraft to gather valuable data during the flybys, which wouldn't
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be feasible once it's locked into Mercury's orbit. This preliminary
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science phase provides crucial preparation time that will help insure
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a smoother transition into the main mission phase. Once the
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spacecraft arrives at Mercury BEPI, Colombo's main science camera remains
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shielded until the orbiters separate, but during this period, the
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spacecraft's monitoring cameras will capture images of Mercury's heavily cratered surface,
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giving us a tantalizing preview of what's to come. Now
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an intriguing Starliner story. Recently, astronaut Butch Wilmore aboard the
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International Space Station reported hearing a strange, pulsing noise emanating
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from Boeing's Starliner spacecraft DOC to the ISS. The intriguing
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incident sparked much curiosity and speculation, but NASA has now
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provided a clear explanation, putting many minds at ease. According
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to NASA, the mysterious noise originated from feedback in the
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audio configuration between Starliner and the ISS. This was not
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entirely unexpected, given the complexity of the space station's audio system,
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which allows multiple spacecraft and modules to be interconnected. NASA
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noted that feedback and noise issues are relatively common under
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these conditions and are routinely managed by the crew in
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contact with mission control. During his work inside Starliner on
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a recent Saturday, Wilmore first noticed the unusual sound. NASA
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promptly addressed the concern and reassured that this noise had
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no technical impact on the crew, Starliner or station operations.
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The issue fortunately did not interfere with Starliner's planned activities,
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including its uncrewed undocking, scheduled for no earlier than Friday,
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September sixth. Moving on, let's take a look at a
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big bang, a really big bang. It's hard to imagine
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the tremendous force that reshaped a moon as vast as Ganymede,
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but an asteroid impact around four bilds million years ago
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did just that. Ganymede, the largest moon in our Solar system,
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even outsizing the planet Mercury, bore the brunt of an
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asteroid impact so colossal it reshaped not just its surface,
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but potentially its very rotation as well. Research led by
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a planetologist from Kobe University has illuminated this ancient transformative
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event by analyzing the furrows on Ganymede's surface, which form
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concentric circles around a specific region. Scientists have traced these
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geological features back to a massive impact. These furrows might
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look like curious surface patterns, but they tell the story
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of an event that was twenty times more powerful than
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the asteroid that led to the extinction of the dinosaurs
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on Earth.
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Ganymede's surface is unique in its own right.
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Not only is this moon tidally locked to Jupiter, much
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like our own moon is to Earth, but it also
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boasts subsurface oceans beneath its icy exterior. This intriguing mix
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of traits makes it a prime candidate for studying the
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effects of such a titan sized impact. The location of
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the impact was almost precisely on the meridian farthest away
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from Jupiter. This detail implied a significant reorientation event that
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mirrors what we've observed from the New Horizon's mission on Pluto.
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Both celestial bodies showcase the traces of ancient impacts that
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were powerful enough to tilt their axes and reshuffle their geologies.
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The crux of the study lies in the computations that
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simulated this monumental collision. According to the findings, the asteroid
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in question likely had a diameter of around three hundred kilometers.
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To put this in perspective, that's roughly the distance from Washington,
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DC to New York City. Such a massive object striking
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Ganymede would have generated a transient crater between one thousand,
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four hundred and one thousand, six hundred kilometers in diameter.
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If you're wondering what a transient crater is, think of
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it as the immediate initial cavity formed right after the collision,
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before any material starts filling it back in, or before
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geological processes begin to alter its shape. It's essentially the
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raw footprint of the impact and provides crucial data for
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simulate research. Leader now Yuki Hirata from Kobe University took
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things a step further by examining the impact on Ganymede's
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internal structure and rotation. His simulations revealed that only an
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impact of the calculated magnitude could have caused such a
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considerable shift in the Moon's rotational axis. This means that
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the asteroid didn't just scar the surface, it also jumbled
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the internal mass distribution to a degree that altered Ganymede's
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orientation permanently. These insights are invaluable, as Herata notes, understanding
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such early significant events provides broader comprehension not only of
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Ganymede's past, but potentially of the early Solar System's dynamics. Furthermore,
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Ganymede's ongoing intrigue lies in its subsurface oceans, areas that
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future missions like the European Space Agency's Juice Probe aim
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to explore.
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Juice, set to.
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Arrive at Ganymede in twenty thirty four, will orbit the
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Moon for six months, gathering data that could answer many
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of the questions raised by this impact discovery. The importance
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of future missions cannot be overstated. With advanced technology and instruments,
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these missions could verify Herata's simulations and perhaps uncover more
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about Ganymede's mysterious oceans and geological history. These discoveries don't
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just add to our knowledge of one moon. They help
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us piece together the grand puzzle of our Solar system's
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formation and evolution. In summary, the ancient cataclysmic event on
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Ganymede is a cornerstone in planetary science. It underscores the
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interconnectedness of celestial mechanics, surface geology, and internal planetary structures,
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and reaffirms why missions to icy moons and distant planets
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are vital for unraveling the complexities of space. Thank you
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for tuning in to astronomy.
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Daily.
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I'm anna and it's been a pleasure bringing you the
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latest in space news. Don't forget to visit our website
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at Astronomy Daily Dio to sign up for our free
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and listen to all our backup thesasses. You can also
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find us on social media by searching for astro Daily
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Pod on Facebook, x, YouTube, and TikTok.
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Until next time, keep looking up Sunday STARSTZ Star, Istz
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