May 1, 2025
Stellar Surprises: Juno's Jupiter Insights, Psyche's Thruster Troubles, and the Mystery of Fleeing Stars
In this episode of Astronomy Daily, join host Anna as she uncovers the latest astonishing discoveries and developments from our cosmic neighborhood. Prepare to be amazed as we delve into the dynamic and ever-surprising universe we inhabit.
Highlights:...
In this episode of Astronomy Daily, join host Anna as she uncovers the latest astonishing discoveries and developments from our cosmic neighborhood. Prepare to be amazed as we delve into the dynamic and ever-surprising universe we inhabit.
Highlights:
- NASA's Juno Mission at Jupiter: Explore the groundbreaking findings from NASA's Juno spacecraft, which has been revealing incredible insights about Jupiter's polar cyclones and detecting warm magma flowing beneath the surface of its volcanic moon, Io. Discover how these revelations are reshaping our understanding of the largest planet in our solar system.
- Challenges with NASA's Psyche Mission: Learn about the unexpected issues faced by the Psyche spacecraft, which is currently addressing a malfunction in its electric propulsion system. Understand how engineers are working diligently to resolve the problem and ensure the mission's success in reaching its asteroid destination.
- Historical Perspectives on Alien Life: Take a fascinating journey through history as we explore how scientists and philosophers once believed that life existed throughout the cosmos. From Nicolaus Cusenus to Thomas Dick, discover the whimsical ideas that shaped our understanding of extraterrestrial life before the advent of modern science.
- The Mysterious Star Cluster Ophion: Uncover the enigma of the Ophion star cluster, where over 1,000 stars are unexpectedly breaking away from their birthplace. This discovery challenges our understanding of stellar families and hints at new dynamics at play in the cosmos.
- Magnetars and the Origins of Gold: Delve into the surprising role of magnetars—powerful neutron stars—in the creation of heavy elements like gold. Learn how recent research suggests these cosmic powerhouses may account for up to 10% of the gold in our galaxy, providing insight into the origins of the precious metals we cherish.
For more cosmic updates, visit our website at astronomydaily.io. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, TikTok, and our new Instagram account! Don’t forget to subscribe to the podcast on Apple Podcasts, Spotify, iHeartRadio, or wherever you get your podcasts.
Thank you for tuning in. This is Anna signing off. Until next time, keep looking up and stay curious about the wonders of our universe.
00:00 - Welcome to Astronomy Daily
01:10 - NASA's Juno mission findings on Jupiter and Io
10:15 - Updates on NASA's Psyche mission challenges
15:30 - Historical perspectives on alien life
20:45 - Discovery of the Ophion star cluster
25:00 - Magnetars and the origins of heavy elements
✍️ Episode References
NASA's Juno Mission
[NASA Juno](https://www.nasa.gov/mission_pages/juno/main/index.html)
NASA's Psyche Mission
[NASA Psyche](https://www.nasa.gov/psyche)
History of Alien Life Beliefs
[History.com](https://www.history.com/)
Ophion Star Cluster
[NASA](https://www.nasa.gov/)
Magnetars and Element Creation
[Columbia University](https://www.columbia.edu/)
Astronomy Daily
[Astronomy Daily](http://www.astronomydaily.io/)
Become a supporter of this podcast:
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Welcome to Astronomy Daily. I'm your host Anna. Today we're
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diving into some fascinating developments across our cosmic neighborhood that
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highlight just how dynamic and surprising our universe can be.
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We'll begin our journey at Jupiter, where NASA's Juno mission
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has been peering beneath the surface of both the gas
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giant and its volcanic moon Io. The spacecraft's instruments have
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revealed remarkable insights about Jupiter's massive polar cyclones and detected
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evidence of still warm magma flowing beneath Io's crust. Then
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we'll check in on NASA's Psyche mission, which is currently
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experiencing some unexpected issues with its electric propulsion system. Don't worry, though,
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engineers are on the case and have redundancy built in
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for precisely these kinds of challenges. We'll also take a
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fascinating historical detour to explore how scientists throughout the centuries
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imagined alien life. You might be surprised to learn that
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many prominent thinkers once believed every planet, star, and even
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the vacuum of space itself must be teeming with living creatures.
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Speaking of surprises, astronomers have discovered something truly puzzling, a
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young family of over one thousand stars that seem to
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be fleeing their birthplace in a tremendous hurry. This star cluster,
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nicknamed Ophion, is breaking all the rules about how stellar
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families typically behave. And finally, we'll explore an unexpected cosmic
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source of precious metals. It turns out that magnetars, incredibly
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powerful neutron stars with massive magnetic fields, may be responsible
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for creating up to ten percent of the heavy elements
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like gold in our galaxy. So settle in as we
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explore these cosmic mysteries and cutting edge discoveries that continue
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to reshape our understanding of the universe around us. Let's
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get started. NASA's junomission, launched in twenty eleven and orbiting
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Jupiter since twenty sixteen, continues to revolutionize our understanding of
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the Solar System's largest planet and its moons. Originally planned
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as a five year mission, UNO has been extended and
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is now scheduled to continue operations until September of this year,
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or until the spacecraft itself can no longer function. One
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of Juno's most fascinating recent discoveries comes from its microwave
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Radiometer MWR, an instrument initially designed to study Jupiter's clouds.
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Scientists cleverly repurposed this technology to examine Io, one of
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Jupiter's four Galilean moons, first observed by Galileo Galilei back
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in sixteen ten. What they found was surprising evidence of
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still warm magma flowing beneath Io's cooled surface crust. As
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Shannon Brown from NASA's Jet Propulsion Laboratory explains, when we
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incorporated the MWR data with Jerum's infrared imagery, we were
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surprised by what we saw. This cooling magma appears to
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be present at virtually every latitude and longitude they examined,
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with approximately ten percent of the Moon's surface showing these remnants.
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These findings help explain Io's extraordinary volcanic activity. The Moon
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essentially funk like a car radiator, efficiently transferring heat from
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its interior to the surface, where it can dissipate into space.
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It's a remarkable cooling system that helps regulate the Moon's
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intense internal heat. Meanwhile, JUNO has been conducting groundbreaking measurements
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of Jupiter's atmospheric temperatures. Since twenty twenty three, for the
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first time ever, scientists have been able to measure the
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temperature of Jupiter's north polar cap, discovering its approximately eleven
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degrees celsius cooler than surrounding areas. This polar region is
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also encircled by powerful winds exceeding one hundred sixty kilometers
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per hour. Perhaps most spectacular are Jupiter's polar cyclones, which
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JUNO has been meticulously tracking. Unlike hurricanes on Earth, which
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form and move in isolation, Jupiter's cyclones operate quite differently.
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The gas giant hosts a massive northern polar cyclone with
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a diameter of three thousand kilometers, nearly as large as
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Earth's moon, surrounded by eight smaller cyclones, each still larger
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than the dwarf planet Pluto. As these cyclones drift toward
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Jupiter's pole, they interact with each other in fascinating ways.
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JUNO co investigator Johai Casspi describes it as a mechanical
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system of springs, with the cyclones bouncing off one another
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while slowly drifting westward in a clockwise pattern around the pole.
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As Scott Bolton, juno's mission principal investigator puts it, everything
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about Jupiter is extreme, from its enormous polar cyclones to
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its fierce jet streams and the intense volcanic activity of Io.
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Jupiter's system continues to demonstrate the immense energies and complex
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dynamics at work in our Solar System's most massive planet.
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Next up today, NASA is currently investigating a concerning issue
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with the electric propulsion system on its Psyche spacecraft, which
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is on a mission to the Main Belt asteroid of
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the same name. On April first, the electric thrusters abruptly
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shut down when pressure fell in a line feeding b
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Zenon propellant to the system. According to a statement released
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by NASA in late April, the pressure dropped from thirty
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six pounds per square inch to twenty six pounds per
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square inch, triggering the shutdown. This information wasn't widely publicized
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until April thirty, when more details began to emerge about
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the situation. The Psyche spacecraft launched in October twenty twenty
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three and had just activated its Hall effect thrusters this
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past May. These thrusters, combined with a Mars gravity assist
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scheduled for May twenty twenty six are crucial for the
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spacecraft to reach its destination asteroid by August twenty twenty nine.
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Without properly functioning thrusters, the entire mission timeline could be jeopardized.
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Louise Proctor, director of NASA's Planetary Science Division, addressed the
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issue at a recent meeting, saying that teams at JPL
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are working diligently to identify the specific problem. Both the
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electric propulsion system and the spacecraft bus were provided by
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Maxar Space Systems, formerly known under different name. Fortunately, NASA
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has stated that Psyche can continue to coast until mid
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June before there would be any significant impact on its trajectory.
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Engineers are exploring potential solutions, including switching to a backup
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propellant line that was wisely incorporated into the spacecraft's design.
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As Proctor reassuringly noted, this kind of thing happens, and
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that's why we build redundancy into our missions. We don't
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have any concerns at the moment about it, but we're
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obviously keeping tabs on it. Prior to this issue, Psyche
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had been performing well since its launch on a Falcon
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heavy rocket. However, the mission itself has faced challenges throughout
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its development, including software testing delays that pushed its launch
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back from August twenty twenty two to October twenty twenty
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three and increased the mission's cost from one billion dollars
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to one point two billion dollars. An investigation into these
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earlier problems revealed broader institutional issues at JPL, stemming from
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heavy workloads and communication problems within the laboratory. The current
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thruster issue appears to be unrelated to these previous challenges,
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but serves as another reminder of the inherent difficulties in
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deep space exploration. Okay, time now for a little history lesson.
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Long before we began searching for biosignatures on distant exoplanets,
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scientists and philosophers were convinced that intelligent life must exist
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throughout the cosmos. It's fascinating to look back at how
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certain many thinkers were that aliens not only existed, but
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populated virtually every surface in the universe. This conviction began
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taking shape in the early fifteen hundreds, when scholars like
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Nicolas Cusanus argued that countless stars and planets must exist
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beyond our own. Remarkably, Cusanus even believed the Sun itself
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was inhabited by what he called bright and enlightened intellectual denizens.
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He wasn't alone in this thinking. The Italian philosopher Giordano
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Bruno similarly reasoned in fifteen eighty four that it would
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be ill if the whole of space were not filled
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with life. These early speculators operated on a simple but
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compelling logic, Why would so much cosmic real estate exist
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if not to be occupied. The belief that everything in
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existence must serve a purpose led to the conclusion that
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uninhabited worlds would represent a cosmic waste. This thinking became
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remarkably mainstream over subsequent centuries. The conviction that every cosmic
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surface must host life led to some extraordinary claims. The
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English astronomer Edmund Halley suggested in sixteen ninety two that
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Earth itself must be hollow and filled with nested spheres
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to maximize living space. Others proposed that even the void
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of space itself teemed with microorganisms, with the French diplomat
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Benois de Mayet theorizing in the seventeen twenties that seeds
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of living creatures circulate throughout the cosmos. Perhaps most amusing
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to our modern sensibilities were the cosmic censuses conducted in
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the eighteen hundreds. Thomas Dick, a British theologian and astronomer,
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used England's population density to calculate that our solar system
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must house nearly twenty two trillion inhabitants. He later expanded
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his estimate to the visible universe, arriving at the specific
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figure of sixty sextilion, five hundred seventy three quintilian living beings.
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Dick confidently declared that there is but one religion throughout
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the universe, conveniently his own. As late as the eighteen nineties,
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some scholars still maintained that the Sun was inhabited. A
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German named Karl Gutzy published a book in eighteen ninety
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six insisting that dinosaurs and mammoths roamed the Sun's clement
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polar regions alongside humans. Even mainstream scientists, like biochemist William
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Theory Prayer, speculated that suns might be glowing organisms whose
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breath may perhaps be shining vapor. This assumption of cosmic
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abundance finally began to crumble in the early twentieth century.
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The discovery of radioactivity revealed that space is filled with
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harmful radiation, while advancing science clarified the stringent conditions required
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for life to exist. By nineteen twenty six, English cosmologist
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James Genes concluded that the physical conditions under which life
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is possible form only a tiny fraction of the range
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of physical conditions which prevail in the universe. Our modern,
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more cautious approach to extraterrestrial life represents a profound shift
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from centuries of wishful thinking. Perhaps this historical perspective should
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remind us to be equally careful with today's tantalizing biosignature discoveries.
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Next up. As you should know by now, I love
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a good mystery in a cosmic puzzle that's leaving astronomers
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scratching their heads. Over one thousand stars are breaking up
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their family reunion far sooner than expected. This newly discovered
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star cluster, nicknamed Ophian after its home constellation Ophiucus, is
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behaving in ways that defy our understanding of stellar families. Typically,
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stars born together from the same molecular cloud stile clustered
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for hundreds of millions of years before gradually drifting apart.
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The Pleiades cluster, visible to the Naked Eye, and Taurus
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is still tightly grouped after one hundred million years. The
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more dispersed Beehive cluster in Cancer has been together for
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around six hundred million years. But Ophion, located about six
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hundred fifty light years away, is essentially a stellar family
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in the midst of a dramatic breakup, despite being just
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twenty million years old. As Dylan Houston of Western Washington University,
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who led the discovery team, explained, Opion is filled with
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stars that are set to rush out across the galaxy
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in a totally haphazard, uncoordinated way, which is far from
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what we'd expect for a family so big. What makes
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this cluster unique is its unusually high velocity dispersion. In
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normal star clusters, the difference between the fastest and slowest
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moving stars is just a few kilometers per second. In Opion,
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that difference is a whopping twenty kilometers per second, meaning
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these stars are moving far too fast to stay together
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for long. The only reason we currently see these stars
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as a group is that they're so young they haven't
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had time to completely separate yet. We're essentially witnessing a
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stellar family. Portrait taken just before the children leave home forever.
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This discovery wasn't immediately obvious. Whusson and his colleague Marina
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Conkle of the University of North Florida, spotted Opeon while
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testing a new model called Gaya net. This tool can
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simultaneously analyze the spectra of millions of stars using data
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from the European Space Agencies GAYA mission, which has measured
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the position, velocity, distance, and spectra of approximately two billion stars.
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So what caused this premature stellar scattering? Examining the GAYA
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data more closely, the team noticed several superbubbles, large voids
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created when supernova shockwaves blow away interstellar gas. It's possible
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that after Opion's stars formed, much of the remaining gas
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was blown away by these stellar blast waves. Losing all
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this mass could have loosened the cluster's gravitational hold on
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its stars. Alternatively, gravitational tidal effects from neighboring star forming
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regions might have given Ophion's stars an extra push. As
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Councl noted, without the huge, high quality data sets from
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GAIA and the new models we can now use to
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dig into these, we may have been missing a big
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piece of the stellar puzzle. This discovery suggests there may
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be other young families of stars racing apart that we
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simply haven't recognized yet, challenging our understanding of how stellar
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nurseries function and evolve. And finally, today, have you ever
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wondered where the gold in your jewelry comes from? Most
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of us know its mind from the Earth, but where
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did the Earth get it? The cosmic origins of heavy
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elements like gold have long fascinated astronomers, with supernovae and
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neutron star collisions typically given credit for forging these precious metals.
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Now an unexpected cosmic goldsmith has entered the scene. Magnetars.
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Magnetars are perhaps the most extreme objects in our universe.
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These rare neutron stars possess magnetic fields up to a
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thousand trillion times stronger than Earth's, Formed from the collapsed
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cores of massive stars after supernovae. They're essentially the ultra dense,
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city sized remnants of stellar deaths, with magnetic fields that
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boggle the mind. What makes this recent discovery so exciting
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is that these cosmic powerhouses may be responsible for creating
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up to ten percent of all the heavy elements like
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gold and platinum in our galaxy. The breakthrough comes from
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Anirud Patel, a doctoral student at Columbia University, who let
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a team analyzing twenty year old archival data from NASA
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and ESA telescopes. Occasionally, magnetars undergo dramatic starquakes that release
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astonishing amounts of energy through giant flares. These flares, visible
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even from other galaxies, create the perfect extreme conditions for
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something called rapid neutron capture, essentially the fusion of neutrons
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into heavier atomic nuclei. This process is precisely what's needed
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to create elements like gold. The discovery solves a persistent
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cosmic mystery. Back in twenty seventeen, astronomers confirmed that collisions
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between two neutron stars could create gold and platinum. This
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was a major breakthrough observed through both NASA telescopes and
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LIGO gravitational wave detectors. However, these mergers occurred too late
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in the universe's history to explain the earliest heavy elements
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we observe. That's where magnetars come in. As Eric Burns,
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a co author of the study published in the Astrophysical
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Journal Letters, explains, this finding represents a breakthrough that solves
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a major cosmic mystery using nearly forgotten data. Since magnetars
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appeared early in the universe's history, they could have been
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responsible for creating the first gold. The research team initially
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