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# CN 1006 was one of the supernova explosions seen during the medieval period. This supernova explosion took place near the star Beta Lupi. Light takes 7200 years to reach Earth from this star. How far from Earth did the explosion occur? (Assume 1 year = 365 days)

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Ans : (B)
$6.81 \times 10^{16}$ km
answered May 30, 2014