Did you know? Mass of Hyperion (moon of Saturn) (5.6 quintillion kg) is 10 x Mass of Juliet (moon of Uranus) (560 quadrillion kg)
Length of a London Underground carriage (18 m)
/fact/length-of-a-london-underground-carriage
Link
If this was a standard unit ...
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.