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A light year (9.46 trillion km) is 4 thousand x Diameter of the star UY Scuti, largest known star (2.377 billion km)
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Number of Estimated British forces killed in World War I (880,000 )
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.