Galactic Superwave Bubbles Seen By Fermi Gamma Ray telescope - Paul LaViolette

In 2011, NASA scientists discovered two enormous “gamma-ray-emitting bubbles” which appear to emanate from the center of the galaxy, each extending 25,000 light years “north and south of the galactic center.” The Milky Way has a diameter of about 100,000 light years in total, and the structure covers more than half of the visible sky. According to USA Today, “each one emits the energy of about 100,000 exploding supernova stars.” The solar system is under constant bombardment from high energy particles.
[It is now thought probable that gamma rays and other high energy particles bombarding the earth in 'superwaves' at periodic intervals of many thousands of years may well cause quantum leaps in the evolution of life on earth.  Messenger Spirit]

See also:  http://www.ascensionnow.co.uk/2/post/2013/01/colossal-cosmic-collision-coming-this-year-at-galactic-center-say-awestruck-astronomers.html

http://theextinctionprotocol.wordpress.com/2013/02/03/colossal-cosmic-collision-coming-this-year-at-center-of-the-galaxy-say-awestruck-astronomers/