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Well depends..

If you're saying that the speed of light is 3x10^8 m/s then 1 light year is 9.46728x10^15 metres

If the speed of light is exact (299,792,458m/s) then 1 light year would be 9,460,730,472,580,800 metres (9.46073x10^15)

Not much difference...

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14y ago

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