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KM3NeT Detects 220 PeV Neutrino: Scientists Rule Out Primordial Black Hole Explosion Near Earth A Record-Breaking Detection Beneath the Mediterranean The KM3NeT collaboration, an extensive international research consortium, operates a vast neutrino telescope network beneath the Mediterranean Sea. Its mission is to detect high-energy neutrino events — exceptionally rare and short-lived interactions involving neutrinos, subatomic particles of almost negligible mass, often dubbed “ghost particles” due to their elusive nature. In a recent breakthrough, the team recorded an extraordinarily powerful neutrino event measuring approximately 220 peta-electron volts (PeV) . This ranks among the most energetic detections ever observed, yet its cosmic source remains unknown. Scientists from the Universidad de São Paulo and the Universidad Autónoma de Madrid have since conducted a theoretical investigation into one compelling hypothesis: that the event may have been triggered by the explos...

LHAASO Discovers the True Origin of the Cosmic Ray "Knee" in the Milky Way Introduction  —  A 70-Year Astrophysics Mystery Solved On 16 November, the Large High Altitude Air Shower Observatory (LHAASO) announced landmark results that resolve a long-standing enigma in astrophysics: the mysterious knee-like dip in the cosmic ray energy spectrum occurring beyond 3 PeV. The origin of the "knee" has puzzled scientists for almost 70 years. It was long thought to mark the acceleration limit of cosmic-ray sources and signal a shift between two power-law energy distributions. Now, two new papers — appearing in National Science Review and Science Bulletin — show that micro-quasars powered by black hole accretion are potent particle accelerators within the Milky Way and likely creators of the "knee." The work was carried out by teams from the Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Nanjing University, the University of Science and Techn...

TeV Halos Around Middle-Aged Pulsars May Be Universal, Study Reveals Introduction: Pulsars and Their Mysterious Radiation Rapidly rotating neutron stars known as pulsars give off periodic radio wave emissions and streams of magnetic radiation, some of which are observable from Earth. These stellar remnants originate from the explosive deaths of massive stars. Discovery of TeV Halos Around Middle-Aged Pulsars Astronomers have recently detected expansive regions emitting gamma rays at TeV energies surrounding middle-aged between 100,000 and one million years. Termed TeV halos, these zones are markedly larger than the pulsars' own wind nebulae — clouds formed by the rotation and magnetic fields of the neutrons stars. Scientific Mystery: What Causes TeV Halos? The existence of TeV halos encircling some middle-aged pulsars is now well-substantiated, but the underlying processes responsible for their emergence are still not fully understood. It also remains an open question whether these...

Wolf-Rayet 104's Pinwheel Star: A Cosmic Mystery Unraveled Introduction New research suggests that the enigmatic Wolf-Rayet 104 "pinwheel star" is more complex than previously believed, yet even less likely to be the catastrophic "death star" once theorized. WR 104: A Binary System with a Rotating Dust Pinwheel A study led by W. M. Keck Observatory Instrument Scientist Grant Hill has confirmed a long-held hypothesis: WR 104 consists of a binary system of massive stars orbiting each other every eight months. Their intense stellar winds collide, forming a rotating dust pinwheel that radiates in the infrared and shares the system's orbital period. Discovery of WR 104's Pinwheel Structure First identified at Keck Observatory in 1999, WR 104's pinwheel structure captivated astronomers with its striking imagery. The system comprises: A Wold-Rayet star an evolved, massive star emitting carbon-enriched winds. A more massive but less evolved OB star, whose wi...

Record Gamma Ray Emissions from the Milky Way's Heart: New Discoveries at HAWC Observatory Introduction to the HAWC Observatory At Mexico's High-Altitude Water Cherenkov (HAWC) observatory, perched 13,000 feet on Sierra Negra Volcano, researchers are probing a cosmic enigma in the Milky Way. An international team, co-led by Los Alamos National Laboratory, has detected ultrahigh-energy gamma rays exceeding 100 teraelectron volts, tracing their source to the galaxy's center for the first time. Breakthrough Discoveries "This breakthrough provides us with an unprecedented look at the center of the Milky Way, revealing energies an order of magnitude higher than anything previously measured," remarked Pat Harding, a physicist at Los Alamos and the Department of Energy's lead investigator on the project. "This study is the first to confirm a PeVatron source of ultrahigh-energy gamma rays at the Milky Way's Galactic Center Ridge, revealing that the galactic c...