Did you know?
Period of Halley's Comet's orbit (75.3 y) is 2 x Time since first Apple Macintosh Computer launched (38 y)
Tweet this comparison
Distance from the Earth to the Sun (149.6 million km)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.