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Could the huge gamma-ray bubbles that extend above and below the center of the Milky Way be a boundary of matter and antimatter, whose collision emits gamma rays? | Astronomy.com

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Could the huge gamma-ray bubbles that extend above and below the center of the Milky Way be a boundary of matter and antimatter, whose collision emits gamma rays?

FROM THE June 2012 ISSUE

Could the huge gamma-ray bubbles that extend above and below the center of the Milky Way be a boundary of matter and antimatter, whose collision emits gamma rays?

Pranathi Swamy, Andhra Pradesh, India

Published: Monday, April 23, 2012

NASA's Goddard Space Flight Center

The only way to produce photons at energies much higher than about 1,000 MeV (which is solidly in the gamma-ray range) is to have protons moving at nearly the speed of light. Although weт??re still not positive what causes the Milky Wayт??s bubbles, matter-antimatter collisions are not a possibility.