If Betelgeuse exploded as a typical Type II supernova at its current distance, how bright would it be relative to the full Moon (around $-12.7 ext{m}$)?
Answer
Slightly dimmer
A Betelgeuse Type II supernova at $170$ parsecs is predicted to reach an apparent magnitude of approximately $-10.85$, placing it slightly dimmer than the full Moon's magnitude of around $-12.7 ext{m}$.
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