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a supernova like the one that made the Crab Nebula, that could be an event that lasts for days?
A considerable amount of energy in a supernova is released by the radioactive decay of cobalt 56
how is that known?
Where does (Cobalt-56) come from?
why should cobalt-56 play such a significant role?
a media release saying that the wave the blast was coming from a supernova