Chandra X-ray Image & DSS Optical Image of Kepler's SNR
These images show an optical view of the region containing the Kepler supernova remnant. On the left, Chandra's X-ray image is composited with the optical, showing the dramatic difference between what is seen in various wavelengths.
(Credit: X-ray: NASA/CXC/NCSU/S.Reynolds et al; Optical: DSS)