Scientists believe that the mysterious glow in our galaxy may be caused by dark matter. What does that mean?
At the center of our galaxy is a mysterious, diffuse glow emitted by gamma rays, the powerful radiation normally emitted by high-energy objects such as rapidly spinning or exploding stars. NASA’s Fermi Gamma-ray Space Telescope detected the glow shortly after launch in 2008, and the light has baffled scientists and fueled speculation about its cause … Read more