About a year ago, astronomers using NASA’s Fermi Gamma-Ray Space Telescope announced an astonishing discovery. I regard it as the single strangest object in the entire universe.
Emanating from the center of our Milky Way galaxy are two bubbles made solely of gamma rays. This would have been strange enough if the bubbles, expanding at 2.2 million miles an hour, were concentric – a bubble within a bubble – with both centered at the galaxy’s core. But no; the two enormous spheres each hover in seemingly empty space above and below the black hole in the Milky Way . . .
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