http://law2.umkc.edu/faculty/projects/ftrials/galileo/defense.html
http://en.wikipedia.org/wiki/Galileo_Galilei
http://en.wikipedia.org/wiki/Ren%C3%A9_Descartes#Descartes.27_moral_philosophy
http://en.wikipedia.org/wiki/Galileo_affair#Trial
https://www.google.com/search?q=Descartes+and+the+galileo+affair&oq=Descartes+and+the+galileo+affair&sugexp=chrome,mod=0&sourceid=chrome&ie=UTF-8
http://www.varchive.org/ce/orbit/descart.htm