The crab nebula is a supernova remnant 6500 light years, Physics

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The crab nebula is a supernova remnant 6500 light years

The Crab Nebula is a supernova remnant 6500 light years away from Earth. Records from the Chinese indicate that they observed this supernova to occur in the year 1054.

a) How far away is the crab nebula in kilometers?
b) How many years ago (from today) did the supernova actually occur?

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Physics: The crab nebula is a supernova remnant 6500 light years

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Physics: The crab nebula is a supernova remnant 6500 light years

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