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ALMA Releases Largest Map of Milky Way’s Core, Revealing Filaments and Rich Organic Chemistry

The new ACES mosaic traces molecular fingerprints across the Galactic Centre to test how stars form under extreme conditions.

Overview

  • The ACES survey stitched numerous ALMA observations into a 650 light‑year panorama of the Central Molecular Zone, the array’s largest mosaic to date.
  • Researchers mapped dozens of molecules across the region, from silicon monoxide to complex organics such as methanol, acetone and ethanol.
  • The image shows widespread thread‑like filaments that appear to funnel gas into dense clouds, alongside cavities and bubbles from stellar explosions.
  • The dataset enables detailed charts of gas flows, turbulence and chemistry from the galactic core down to individual star‑forming clumps.
  • An international team led by Steven Longmore reports the results in peer‑reviewed work published in Monthly Notices of the Royal Astronomical Society.