Contact: Gravity Fields Festival South Kesteven District Council Council Offices St Peter's 爬坡道, 小山 Grantham Lincolnshire NG31 6PZ United Kingdom

The System of the World: Demonstrated in an Easy and 流行的 Manner. Being a Proper Introduction to the Most Sublime Philosophy. 由 the Illustrious Sir Isaac Newton. Translated Into English (Google eBook)

Astronomical facts in the Bible