Giant Gamma-Ray Bubbles In The Milky Way
Using data from NASA's Fermi Gamma-ray Space Telescope, scientists have discovered a gigantic, mysterious structure in our galaxy.
This never-before-seen feature looks like a pair of bubbles extending above and below our galaxy's center.
Each lobe is 25,000 light-years tall. Within the bubbles, extremely energetic electrons are interacting with lower-energy light to create gamma rays.