On November 9th, 2010, a group of scientists at NASA's Fermi Gamma-Ray Space Telescope announced the discovery of two bubbles of energy erupting from the center of our galaxy. The structure spans more than half of the visible sky, from the constellation Virgo to the constellation Grus, and it may be have been around for millions of years.
These bubbles extend 25,000 light years from each side of our galaxy and contain the energy equivalent of 100,000 supernovae.
NASA Press Release:
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