{"blocks":[{"type":"image","data":{"file":{"url":"https://thedebrief.org/wp-content/uploads/2025/05/Planet-X.jpg"},"caption":"Planet X"}},{"type":"paragraph","data":{"text":"Welcome to this week’s installment of The Intelligence Brief… Recently, a longstanding astronomical controversy has seen renewed debate, as researchers have presented what they believe to be new evidence for the existence of a secret “super-Earth” hidden somewhere in our distant solar system. In our analysis, we’ll be looking at 1) how anomalies in our solar system have long suggested the presence of a large, hidden object somewhere out there, 2) a look at the enduring quest for “Planet X”, 3) how new clues—and a potential candidate—have recently been unearthed from old data, and 4) what the implications of such a discovery, if proven, would be."}},{"type":"header","data":{"text":"Quote of the Week ","level":2}},{"type":"paragraph","data":{"text":"“We don't have definitive proof yet that there's a planetary-mass body out there, but something funny is going on that we don't understand.”"}},{"type":"header","data":{"text":"- Nathan Kaib, Carnegie Institution Planet Formation Theorist","level":3}},{"type":"delimiter","data":{}},{"type":"header","data":{"text":"RECENT NEWS from The Debrief","level":2}},{"type":"list","data":{"style":"unordered","items":["NASA's James Webb Space Telescope has spotted unexpected light activity on Jupiter that has baffled astronomers.","\r\n

Scientists have unmasked an eerie 'Skinwalker' parasite that kills human cells and then wears their skin as a disguise to avoid detection.

","This incredible U.S. Army-funded tool can help cities react to crisis and chaos in real-time.","Get all the latest stories from The Debrief at our website, with more breaking stories at the end of this week's newsletter."]}},{"type":"delimiter","data":{}},{"type":"header","data":{"text":"Oddities in Our Planetary Neighborhood ","level":2}},{"type":"paragraph","data":{"text":"For decades, astronomers have been aware that something just isn’t quite right about our solar system."}},{"type":"paragraph","data":{"text":"Over the years, detections of anomalies in the orbits of distant dwarf planets and icy objects in the Kuiper Belt and evidence of odd “clustering” some of these space objects exhibit, as well as high inclinations of distant populations of trans-Neptunian bodies, and even objects between giant planets that orbit the Sun, but in a retrograde direction, have all suggested that something is fundamentally incomplete about our understanding of our planetary neighborhood."}},{"type":"paragraph","data":{"text":"Such orbital oddities have caused many astronomers to consider whether a ninth planet—a hypothetical celestial body that remains invisible to astronomers, but the existence of which can be inferred from its influence on other objects—might be lurking somewhere in the farthest reaches of our solar system. But if so, how could it have remained hidden for so long, and what would its existence, if proven, actually mean?"}},{"type":"header","data":{"text":"The Quest For “Planet X” ","level":2}},{"type":"paragraph","data":{"text":"The idea that a distant, hidden planet might exist in our solar system has been around for a while. In the early days of 20th-century astronomy, icons such as Percival Lowell theorized whether a hidden body, often referred to as “Planet X,” could be inferred from irregularities in Uranus’s orbit."}},{"type":"paragraph","data":{"text":"Eventually, these theories were validated with the discovery of Pluto in 1930, which secured its place as the solar system’s ninth planet until 2006, when the International Astronomical Union finally concluded it no longer met the criteria for being a planet (primarily because it does not clear its orbit of other objects) and downgraded it to a dwarf planet."}},{"type":"paragraph","data":{"text":"In the wake of Pluto’s reclassification, in 2016, Caltech astronomers Konstantin Batygin and Mike Brown proposed that an unknown Planet Nine might still exist in an orbit much further beyond Pluto in the solar system’s outermost region. The idea they proposed was that a hidden planet roughly the size of Neptune, and between 5 and 10 times the mass of Earth, might be orbiting the Sun on a highly elongated path that could be 30 times more distant than Neptune, meaning it would take up to 20,000 years to complete just one orbit."}},{"type":"paragraph","data":{"text":"While the idea remains possible based on extreme gravitational anomalies observed in trans-Neptunian objects (ETNOs), the question of Planet Nine’s existence remains theoretical. However, a potential new clue in the decades-long search for a hidden planet somewhere out there beyond Neptune has now emerged, and in a somewhat surprising place: within old satellite data that offers fresh momentum to the longstanding investigation into whether a giant planet has secretly been lurking in our solar system."}},{"type":"header","data":{"text":"A Giant in the Shadows: New Clues from Old Data","level":2}},{"type":"paragraph","data":{"text":"In a recent study by Terry Phan, a doctoral student at Taiwan’s National Tsing Hua University, Phan and his colleagues probed archival data from the decommissioned IRAS and AKARI infrared satellites in search of slow-moving distant objects that might be ideal candidates for the mysterious, hypothetical ninth planet."}},{"type":"paragraph","data":{"text":"After filtering out known celestial bodies, Phan and his colleagues were indeed able to locate one good candidate: a faint dot that appeared consistently across both of their datasets and displayed promising characteristics, including moving in a way suggestive of an extremely distant planetary orbit."}},{"type":"paragraph","data":{"text":"\"It’s motivated us a lot,\" Phan said of the discovery, which was published as a preprint on April 24 and accepted for publication in Publications of the Astronomical Society of Australia (Phan and his colleague's paper can be found here)."}},{"type":"header","data":{"text":"Scientific Skepticism and the Case for Caution","level":2}},{"type":"paragraph","data":{"text":"However, not everyone is as excited by Phan’s discovery, including even a few of the earliest proponents of the modern hunt for a ninth planet. Mike Brown, co-creator of the Planet Nine hypothesis, also examined the estimated orbit of the object Phan and his colleagues discovered, reporting what he believes are major discrepancies regarding the newly reported findings."}},{"type":"paragraph","data":{"text":"Specifically, the new candidate seems to exhibit an orbital tilt of 120 degrees, which Brown and others have suggested is too far beyond Planet Nine’s predicted tilt of 15–20 degrees. Adding to the doubt among astronomers, Brown said that Phan and his team’s candidate also tilts in the opposite direction from the solar system’s primary planetary plane, all of which would lessen the likelihood that such an object—planet or otherwise—could account for the anomalies present in our solar system that prompted the search for a hypothetical “Planet X” in the first place."}},{"type":"paragraph","data":{"text":"Intriguingly, these discrepancies don’t necessarily rule out the possibility that the newly discovered candidate might actually be an undiscovered planet. However, if this were the case, its peculiarities seem to suggest that it is not the mystery “Planet Nine,” but instead an entirely separate and unexpected celestial body that, if anything, might disprove original ideas about orbital instabilities in the outer solar system."}},{"type":"header","data":{"text":"The Search Continues ","level":2}},{"type":"paragraph","data":{"text":"While debate continues, the search for additional planets in our solar system remains underway. Ground-based observatories like Hawaii’s Keck and Subaru telescopes, along with citizen science initiatives like Backyard Worlds: Planet 9, continue to scour our solar system for additional candidates. Arguably. The Vera C. Rubin Observatory, which began initial on-sky operations late last year and will achieve system first light in July, may offer the best chance yet to confirm or refute Planet Nine’s existence. Equipped with the world’s largest digital camera, the observatory will conduct a decade-long survey of the Southern Hemisphere that could identify many more Kuiper Belt objects with suspiciously aligned orbits, if they exist."}},{"type":"paragraph","data":{"text":"Whether or not such observations reveal the long-suspected existence of a hidden planet in our solar system, or simply raise new questions about the existing anomalies in our solar system, remains to be seen. However, if eventually proven, the existence of Planet Nine may help to bring our solar system closer in line with more distant observations of exoplanets, which have revealed that the presence of “super Earths” is actually fairly common in other planetary systems."}},{"type":"paragraph","data":{"text":"For now, Planet Nine remains an intriguing possibility for astronomers, albeit one that holds a steady orbit in the realm of scientific theory—at least until its existence is proven, perhaps with the help of tomorrow’s advanced space observatories."}},{"type":"paragraph","data":{"text":"That concludes this week’s installment of The Intelligence Brief. You can read past editions of our newsletter at our website, or if you found this installment online, don’t forget to subscribe and get future email editions from us here. Also, if you have a tip or other information you’d like to send along directly to me, you can email me at micah [@] thedebrief [dot] org, or reach me on X: @MicahHanks."}},{"type":"image","data":{"file":{"url":"https://thedebrief.org/wp-content/uploads/2020/02/latest.png"},"caption":""}},{"type":"paragraph","data":{"text":"Here are the top stories we're covering right now..."}},{"type":"list","data":{"style":"unordered","items":["An Underwater Volcano Off the Pacific Coast Could Soon Erupt—Here’s What You Need to Know\r\n

The underwater volcano, Axial Seamount, off the coast of the Pacific Northwest is heading to eruption for the first time in a decade.

","James Webb Space Telescope Spots Unexpected Light Activity on Jupiter That Has Astronomers “Scratching Our Heads”\r\n

Stunning auroral activity has been observed on Jupiter, in an unexpected new discovery that has perplexed astronomers as to how it happens.

","“It Can Kill Anything You Throw at It.” ‘Skinwalker’ Parasite Kills Human Cells and Wears Their Remains as a Disguise to Escape Death\r\n

Scientists unmask a 'Skinwalker' parasite that kills human cells and then wears their skin as a disguise to avoid detection.

","Apple Taps Synchron to Explore Mind-Controlled iPhone Technology\r\n

Apple is reportedly working with brain-computer interface (BCI) company Synchron to develop technology that allows users to control their iPhones and other Apple devices using their minds.

","Does ‘Minecraft’ Have Free Will? Expert Says Game’s Voyager Agent Meets All Three Conditions\r\n

A Finnish philosophy professor says the generative AI 'Voyager' agent in Minecraft meets the three primary criteria for free will.

","Scientists Propose Breakthrough Model for the Long-Sought ‘Theory of Everything’\r\n

A long-elusive \"theory of everything\" may finally be within reach as Finnish researchers unveil a new quantum theory of gravity.

","Quasars May Help Detect Gravitational Waves from Ancient Black Hole Collisions, This Astrophysicist Says\r\n

An astrophysicist has proposed a new method for detecting slow-moving gravitational waves using light from distant quasars.

","Discovery of Ancient Lost Settlement on Scotland’s Isle of Skye Rewrites Early Human History\r\n

Archaeologists uncover ancient settlement on Scotland’s Isle of Skye, revealing early human survival and resilience in extreme environments.

","A Centuries-Old “Impossible” Equation, Once Considered Unsolvable, Finally Has a Solution\r\n

A mathematician and a computer scientist have just solved an \"impossible\" equation that has been considered unsolvable for centuries.

","The Website of the Office of the Director of National Intelligence Has Been Missing in Action for Days\r\n

The official website of the U.S. Office of the Director of National Intelligence (ODNI) appears to have been taken down over the weekend.

","Seismic Signals Hint at Presence of Liquid Water Deep Beneath the Martian Surface\r\n

Recent Martian seismic activity suggests water in the Red Planet's crust, a potential boon to long term human habitation in the future.

","Hidden Beneath Antarctic Ice for Eons, a “Deeply Puzzling” Soviet-era Discovery Finally Reveals Its Secrets\r\n

Scientists reveal new discoveries about a mystery that has remained hidden beneath Antarctic ice for half a billion years.

","The End of the Universe Could Arrive “Much Sooner Than Expected,” Astronomers Now Warn\r\n

New study suggests neutron stars, white dwarfs, and black holes may decay sooner than thought, reshaping cosmic fate theories.

","Transmuting Lead into Gold, CERN’s Large Hadron Collider Achieves Alchemist’s Dreams for a Fraction of a Second\r\n

CERN’s Large Hadron Collider (LHC) has momentarily transformed lead into gold, the long-sought-after goal of medieval alchemists.

","Department of Energy-Funded Fusion Breakthrough Achieves “Paradigm Shift” in Magnetic Confinement\r\n

Scientists have achieved a breakthrough in magnetic confinement that could potentially quicken the advancement for fusion energy.

","NASA’s Hubble Spots Runaway Black Hole Devouring a Star 600 Million Light-Years From Earth\r\n

A traveling black hole stalking the cosmos for stellar prey recently revealed itself by shredding a star in a radioactive burst.

","Soviet-Era Kosmos 482 Space Probe Will Fall to Earth This Week—But Will It Burn Up During Re-Entry?\r\n

A Soviet space probe, stranded in Earth’s orbit for 53 years, is set to re-enter the atmosphere this week. And it may not burn up on re-entry.

","This Edible Robot Becomes Fish Food After Completing Remote Sensing Missions\r\n

An edible robot designed by Swiss researchers is taking cues from nature, offering remote sensing with fewer environmental concerns.

","Neuralink Patient with ALS Edits and Narrates Video Using Only His Brain in Historic First\r\n

The first nonverbal patient to receive Neuralink’s brain implant has edited and narrated a video online using only his brain signals.

","Strange ‘Terrell-Penrose Effect’ Observed in Lab For the First Time, in New Confirmation of Einstein’s Special Relativity\r\n

Physicists have demonstrated the Terrell-Penrose effect, which causes an object moving close to the speed of light to warp before our eyes.

","NASA’s IXPE Solves Mystery of X-Ray Emissions from Supermassive Black Hole\r\n

A supermassive black hole, blazar BL Lacertae, has finally revealed how these cosmic features generate X-rays thanks to NASA's IXPE.

","The Kessler Syndrome: Crisis in Space Intensifies as Thousands of Satellites Crowd Earth Orbit\r\n

This week we look at the \"Kessler Syndrome,\" and how a chain reaction of orbital collisions could jeopardize infrastructure in space.

","“Anomalous” Discovery in Antarctica Has Left Climate Scientists Scratching Their Heads\r\n

A discovery in Antarctica has revealed something few scientists would have expected: a reversal of its decades-long ice loss.

","From Blockchain to Brainwaves: Coinbase Co-Founder Fred Ehrsam Enters the Neurotech Race with Non-Invasive BCI Startup Nudge\r\n

Co-founder of Coinbase Fred Ehrsam is unveiling Nudge, a non-invasive brain-computer interface that modulates brain activity with sound waves.

","Controversial Plan to Block Sunlight with Geoengineering Advanced by Shadowy UK Government Agency\r\n

Controversial geoengineering research, including a plan to block sunlight, could be just as dangerous as the climate crisis scientists warn.

","DARPA-Funded Research Develops Novel Technology to Combat Treatment-Resistant PTSD\r\n

Groundbreaking research has revealed a new method of potentially eliminating hard-to-treat post-traumatic stress disorder (PTSD) diagnoses.

"]}}]}

The Hunt for “Planet X”: Is a Secret “Super-Earth” Lurking in Our Solar System?