The Hunt for Vulcan by Thomas Levenson
Finished reading on January 31st, 2016
This book is quite small and short and tells of the history of the non-existing planet Vulcan, why some astronomers thought it existed and how it finally disappeared because of Albert Einstein’s General Relativity.
I found the book an easy read, the beginning is rather detailed – you find out more about the astronomer Le Verrier and some of the astronomers who tried to see Vulcan transiting or tried to see it during an eclipse.
You get the idea of why there had to be a planet according to Newtonian gravity, and later you sort of get it also why according to Einstein’s there really is no need for another planet to explain Mercury’s orbit.
It’s great for some light reading.