The Zero Universe
Mankind started early in studying the sky above and by lengthy and exactly observing they got an idea of the firmament. One of the first results that are still visible is a tablet in stone made by the Sumerians (5000 years ago) and showing a star surrounded by balls of different size. It is thus imagenable that they knew that the planets circled around the sun. The knowledge of the Sumerians disappeared and from that time on the earth was the centre of the universe. To understand the movements of the then known planets (Mercure, Venus, Mars, Jupiter, Saturn) more and more complex ideas and calculations were made to get a sound result. This theories from Ptolemeus and others never gave a satisfying result.   Nicolaas Copernicus (1472-1543) placed the sun in the centre. The Roman Catholic church knew tthat this book existed  and that it described this idea but took no action because they thought it to be a mathematic fiction. Galileo Galilei (1564-1642) by the observations he made with his telescope, came to the conclusion that Copernicus was right. While this idea was different of that of the Bible he had to make corrections to prevent of being burnt at the stake.  Johannes Kepler (1571-1630) calculated the movements of the planets and made laws who formulated them. From this time on the heliocentric model was accepted. Isaac Newton (1643-1727) made laws fundamental for the mechanics of the sky. Henry Cavendish (1731-1810) by an ingeneous way measured the Gravitational Constant introduced by  Newton. This constant is a zero followed with ten zeroes and than a significant figure.