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" ... Originally called a stella nova (for "new star") by Tycho Brahe in 1572, these events are now recognized as supernovae, where a massive star or stellar corpse undergoes a runaway fusion reaction, brightening tremendously and illuminating the stellar debris surrounding it. For many years, scientists broadly categorized them in two different ways: either arising from stellar remnants or from the core collapse of a massive star. We've learned so much more about the life-and-death of stars, though. We now know there are six different ways to make a supernova. ... "