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
The Lightning and the Sun and first published in 1958 in Calcutta, she said it "could be described as a personal answer to the events of 1945 and of the following years." It is dedicated "To the god-like Individual of our times; the Man against Time; the greatest European of all times; both Sun and Lightning: Adolf Hitler, as a tribute of unfailing love and loyalty, for ever and ever." It opens with quotations from "The Bhagavad Gita" and Rudolf Hess. The Lightning and the Sun The Lightning and the Sun is a 1958 book by Savitri Devi Mukherji, in which the author outlines her