Did you know?
Circumference of Neptune (154,600 km) is 50 x Length of India, North to South (3,100 km)
Tweet this comparison
Pop. of Lima, Peru (8.69 million people)
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.