Timeline of astronomy Rectification of Planetary Theory", eliminated the need for an equant by introducing an extra epicycle, departing from the Ptolemaic system in a way very similar to what Copernicus later also did. Ibn al-Shatir proposed a system that was only approximately geocentric, rather than exactly so, having demonstrated trigonometrically that the Earth was not the exact center of the universe. His rectification is later used in the Copernican model. Nicolaus Copernicus publishes "De revolutionibus orbium coelestium" containing his theory that Earth travels around the Sun. However, he complicates his theory by retaining Plato's perfect circular orbits of the planets. A brilliant
Entertainment in the 16th century stocks. Another popular public event with spectators, was the witch trial by use of water trial.(Lambert, 2007). Entertainment in the 16th century British Entertainment in the 16th century included art, fencing, painting, the stocks and even executions. While the 16th century and early 17th century squarely fall into the Renaissance period in Europe, that period was not only one of scientific and cultural advance, but also involved the development of changing forms of entertainment – both for the masses and for the elite. Despite the great breadth of advancements in the arts during this time, the economic conditions of this