Tycho Supernova Remnant in X-rays (IMAGE) Center for Astrophysics | Harvard & Smithsonian Caption This is a photograph of the Tycho supernova remnant taken by the Chandra X-ray Observatory. Low-energy X-rays (red) in the image show expanding debris from the supernova explosion and high energy X-rays (blue) show the blast wave, a shell of extremely energetic electrons. Credit X-ray: NASA/CXC/Rutgers/K. Eriksen et al.; Optical (starry background): DSS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.