A young ultrahigh-pressure eclogite records an initially warm then cold subduction path, suggesting that ultrahigh pressure metamorphism does not always indicate cold subduction, according to a thermo...

A 3-D thermal model identifies a ~ 4.33 Ga temporal “sweet spot” for life’s origin, when decreased bombardment enabled mild hydrothermal niches to support RNA World chemistry and stable biomolecu...

The formation process of polycyclic aromatic hydrocarbons (PAHs) at very low metallicity is uncertain. The detection of PAHs in a 7% solar metallicity galaxy, along with emission from compact clumps a...

The recent detection of polycyclic aromatic hydrocarbons and their cyano derivatives in the cold Taurus Molecular Cloud challenges existing models of formation and survival under such harsh conditions...

Spectroscopic analyses of CI chondrites and samples from Ryugu identify the preservation of poorly crystalline magnesium silicate hydrate-like material which may explain how primitive bulk chemistry i...

Deep-sea temperatures in the Pacific Ocean and North Atlantic Ocean responded differently to the expansion of the Antarctic ice sheet at the Eocene–Oligocene transition, according to benthic foraminif...

Nature Astronomy, Published online: 17 September 2026; doi:10.1038/s41550-026-02951-1By observing disrupted stars, Goodwin and Mummery show that supermassive black holes launch outflows at the same critical accretion rates as stellar-mass black holes, pointing to a universal, mass-independent jet-launching mechanism.

Nature Astronomy, Published online: 18 September 2026; doi:10.1038/s41550-026-02976-6Iron meteorite chemistry reveals that the earliest outer Solar System planetesimals contained far less primitive dust than later-formed bodies, establishing that aerodynamic sorting shaped planetary building blocks from the onset of planet formation.

Hidden in the shapes and positions of millions of galaxies is a measurement of what the universe is made of, if you're careful enough to extract it.

プレスリリース橘 省吾（宇宙惑星科学機構／地球惑星科学専攻 教授） 発表概要 北海道大学大学院理学研究院の川﨑教行准教授及び圦本尚義名誉教授、同大学総合イノベーション創発機構の坂本直哉准教授、茨城大学学術研究院基礎自然科学野の藤谷　渉准教授

Rapid caldera collapse during submarine eruptions could increase tsunami magnitude, suggests an analysis of the geomorphological evolution of the caldera formed in the climactic eruption of Hunga volc...

すばらしき新世代2014 [社会・政治・時事] 全然すばらしくない※前回の動画より不謹慎になってるかも知れないので気を付けてください。※さっそ...

Nature Astronomy, Published online: 10 September 2026; doi:10.1038/s41550-026-02915-5Using simulations of the neutron star population, this study finds that Galactic supernova rates are higher than expected and that magnetars may represent nearly half of all neutron stars, making them capable of powering some of the Universe’s most energetic events.

ナムコクロスカプコン OP 素晴らしき新世界

これまで日本国内で産出が確認されている全ての鉱物（1528種）について，学名，化学式，物性，形態，産状，産地，関連文献などの学術情報を，1100点超の豊富な鉱物写真とともにビジュアルに解説したフルカラー事典．〔内容〕鉱物の定義／性質／分類／命名法／日本の地質／研究史／鉱物情報／学名和名対照表／都道府県別鉱山所在地

Nature Astronomy, Published online: 08 September 2026; doi:10.1038/s41550-026-02970-yHeliobiology is a new interdisciplinary field that links heliophysics, astrophysics, planetary science and chemistry with an astrobiological focus. We propose a formal definition of heliobiology and a practical framework for its implementation.

Nature Astronomy, Published online: 09 September 2026; doi:10.1038/s41550-026-02959-7Hypersoft X-ray sources are found in an observational blind spot; they can be extremely luminous in the X-ray band and extreme ultraviolet, and are likely to be X-ray binary systems. Their energetics suggest that they play a crucial role in ionizing galaxies.

Nature Astronomy, Published online: 08 September 2026; doi:10.1038/s41550-026-02914-6BepiColombo’s flyby at just 165 km from Mercury observed sustained precipitation of energetic solar protons and electrons onto the planet’s surface, with potentially long-term impact on its weathering and mineralogy.

Nature Astronomy, Published online: 07 September 2026; doi:10.1038/s41550-026-02973-9Evidence for phenylium reactivity under interstellar-relevant conditions

Nature Astronomy, Published online: 04 September 2026; doi:10.1038/s41550-026-02934-2Little red dots (LRDs) are a new class of object uncovered by deep JWST surveys at high redshift. This Perspective summarizes our current observational understanding of LRDs and considers possible scenarios for their central engines.

Analysis of asteroid Ryugu samples reveals ammonium-rich clays and other nitrogen compounds linked to sodium salts, suggesting late-stage brines in Ryugu’s progenitor preserved reactive nitrogen that ...

Nature Astronomy, Published online: 01 September 2026; doi:10.1038/s41550-026-02965-9Spectroscopy from over 2.5 million galaxies shows that the Universe has retained most of its atomic hydrogen over the past 4.5 billion years even as star formation fell sharply, pointing to inefficient gas conversion rather than depletion of the atomic gas reservoir.

研究者情報研究者名伊藤 正一

Simulations show that the large depression at the south pole of the Martian moon Deimos formed in an oblique impact that also smoothed its surface, revealing a very weak surface over a porous, fractur...