'Ice in a volcano' reveals age of gas cloud at Milky Way's center
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. "The Fermi bubbles are enormous structures of hot gas that extend above and below the disk of the Milky Way, reac