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2 stories for“Nature Astronomy”

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Ancient Iron Meteorites Show the Solar System Sorted Its Building Blocks by Fire From the Very Start

Analysis of iron meteorites found their parent bodies were built almost entirely from heat-forged chondrules rather than water-rich dust, pushing selective planet-building back to the Solar System's first million years.

Sep 29, 2026

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A Hundred Radio Flashes From Deep Space Have Given Astronomers a New Way to Weigh the Universe's Missing Matter

Fast radio bursts last a millisecond and arrive smeared by everything they pass through. Caltech's Kritti Sharma and Vikram Ravi used that smear from about a hundred of them to measure how clumpy the gas between galaxies is. It is smoother than anyone thought.

Sep 15, 2026