Researchers have found clouds of cold gas embedded deep within larger, superheated gas clouds—or Fermi bubbles—at the Milky Way’s center. The finding challenges current models of Fermi bubble formation and reveals that the bubbles are much younger than previously estimated.



Summary

Astronomers have discovered pockets of cold gas nestled within the Milky Way’s Fermi bubbles, gigantic structures filled with extremely hot gas emanating from the galactic center. This unexpected discovery contradicts existing theories about how these bubbles were formed. The presence of cold gas implies that the Fermi bubbles are significantly younger than originally thought, as the cold gas would have dissipated over longer timescales. This new understanding necessitates a re-evaluation of the processes driving activity and energy transport from the heart of our galaxy.

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