In order to understand the origin and acceleration of cosmic ray protons, researchers used data from the Fermi Gamma-ray Space Telescope, and targeted W44 and IC 443, two supernova remnants located ... more 
In order to understand the origin and acceleration of cosmic ray protons, researchers used data from the Fermi Gamma-ray Space Telescope, and targeted W44 and IC 443, two supernova remnants located thousands of light years away. Image released less 
1 / 7
SPACE.com | Photo By NASA/DOE/Fermi LAT Collaboration
Thu, Feb 14, 2013 2:36 PM EST