The Milky Way's Giant Bubbles Are Hiding a Chilling Secret

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Like ice cubes in a volcano: The two gigantic plasma bubbles in our Milky Way hide surprising things. Because in the midst of this millions of degrees hot plasma, several surprisingly cool hydrogen clouds hide. They are larger, more structured and colder than all the gases observed so far in these Fermi bubbles. Where they come from and why they have been preserved for so long is a mystery so far. In the center of the Milky Way gigantic structur…