Question: Approximately how many days does it take for a massive star supernova to decline to 1% of its peak brightness? a. 3 days b. 30

Approximately how many days does it take for a massive star supernova to decline to 1% of its peak brightness?
a. 3 days
b. 30 days
c. 170 days
d. 300 days

1010 10 massive star supernova -white dwarf supernova 108 107 50 100 150 200 250 300 350 400 time (days) luminosity (solar units)

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