研究チームは、日本の古代樹木の炭素14濃度の急上昇を分析し、中世の赤いオーロラの記録と照合することで、1200年頃に地球を襲った強力な太陽陽子イベントの証拠を発見しました。
沖縄科学技術大学院大学の研究チームが主導したこの研究では、この亜極端な現象が1200年の冬から1201年の春の間に発生したことが特定されました。研究では、青森県で出土したアスナロの樹木を用いた超高精度の炭素14測定結果と、日本の日記に記された北の空の赤い光の記述や中国での類似の報告などの歴史的記録が統合されました。
Scientists have detected traces of iron-60 in Antarctic ice up to 80,000 years old, showing that the solar system is moving through material from an ancient stellar explosion. The findings come from a study published in Physical Review Letters and point to the Local Interstellar Cloud as the source of the radioactive isotope.
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A team of Penn State researchers has captured the first natural observations of trees emitting faint electrical glows, known as corona discharges, during thunderstorms. The discovery, made in North Carolina, confirms a phenomenon long theorized but never seen outside laboratories. These glows may contribute to air cleaning by producing hydroxyl radicals.
New research proposes that Dante Alighieri's 14th-century work Inferno contains an early description of a massive asteroid striking Earth. Timothy Burbery of Marshall University argues the poem depicts Satan as a cosmic impactor that reshapes the planet. The interpretation links literary elements to modern understanding of meteor impacts.
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NASA's Juno spacecraft has revealed that lightning in Jupiter's storms is at least 100 times more powerful than on Earth, based on data from 2021 and 2022. The findings, published on March 20 in AGU Advances, come as the mission's future hangs in balance due to budget constraints. NASA officials are weighing whether to extend operations amid funding shortfalls.
An asteroid wiped out the dinosaurs 66 million years ago, raising questions about whether humanity faces a similar threat. While large impacts are rare, ongoing monitoring and technology offer ways to mitigate potential dangers. Experts emphasize preparation over worry for this distant risk.
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A meteorite has caused property damage to several houses in Rhineland-Palatinate. Eyewitnesses across western Germany reported a spectacular light show in the sky. Police confirm there is no longer any danger and no one was injured.