C. The absolute magnitude of a star in the Andromeda Galaxy (d = 690kpc) is M = 5. The star explodes as a supernova, bec

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C. The absolute magnitude of a star in the Andromeda Galaxy (d = 690kpc) is M = 5. The star explodes as a supernova, bec

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C. The absolute magnitude of a star in the Andromeda Galaxy (d =690kpc) is M = 5. The star explodes as a supernova, becoming109 times brighter. What is its new apparentmagnitude?
Answer: m= 6.7
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