The Milky Way is blowing bubbles of cosmic proportions.
BUBBLE JET Two newly discovered gamma-ray bubbles extend 25,000 light-years, or roughly one-fourth the Milky Way’s diameter, above and below the plane of the galaxy, as shown in this illustration. NASA-Goddard
Twin bubbles of gamma ray–emitting gas, each the size of a small galaxy, sit above and below the center of the Milky Way like the ends of a giant dumbbell, astronomers have discovered.
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