The supernova remnent E0102-72 is seen in the light of X-ray lines 
of oxygen, neon and other elements.  The Chandra High Energy Transmission 
Gratings spread the light out according to its energy, so that each individual
X-ray line from each element forms a unique image, captured here by the 
Advanced CCD Imaging Spectrometer.

Credit:  NASA/MIT/C. Canizares, K. Flanagan, J. Houck.