False-color Chandra X-ray Observatory image of supernova remnant E0102.2-72, the spectacular remains of a core-collapse supernova located about 190,000 light-years away in the Small Megallanic Cloud in the constellation Tucana. The expanding multimillion-degree remnant is about 30 light-years across. What appear to be Rayleigh-Taylor "spikes" can be seen in the outer edge of the expanding supernova remnant. Credit: (X-ray) NASA/CXC/MIT/D. Dewey et al. and NASA/CXC/SAO/J. DePasquale; (optical) NASA/STScI