Astronomy Fun Fact:Though technically a supernova, the Tycho event is kin to the novae which arise from a companion star's infalling stellar material accumulating on a white dwarf. "Little" events such as novae merely blow off the accumulated material in a titanic nuclear blast. But if the material accumulates until the dwarf star gains mass beyond the Chandrasekhar limit, watch out. Then it can destroy itself in the resulting explosion. Astronomers classify this as a Type Ia supernova, as opposed to the Type II (massive star at the end of its life explodes when out of fusion fuel).
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