Did you know?
Pop. of Tehran, Iran (8.15 million people) is about as big as Pop. of Shenyang, China (8.11 million people)
Tweet this comparison
Distance to Andromeda (closest galaxy to the Milky Way) (24.22 quintillion km)
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.