Did you know? Time since the birth of al-Kindi (1,218 y) is 25 x Time since first Boeing 747 entering service (49 y) Tweet this comparison
A parsec (31 trillion km)
/fact/a-parsec
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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.
