What is 10 miles across, but powers an explosion brighter than the Milky Way?
Astronomers studying what may be the most powerful supernova ever seen ...
Supernovas are rare, but not uncommon. Notable ones have occured a few times in the last 100 years or so. But this one is big ... really big. And it may require physical mechanisms that are currently beyond our understanding. See Science Daily for the details.
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