Which Event Marks the Beginning of a Supernova

question 113

Multiple Choice

Which event marks the beginning of a supernova?

• A)the sudden collapse of an iron core into a compact ball of neutrons
• B)the onset of helium burning after a helium flash in a star with mass comparable to that of the Sun
• C)the beginning of neon burning in an extremely massive star
• D)the sudden outpouring of X- rays from a newly formed accretion disk
• E)the expansion of a low- mass star into a red giant

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