De revolutionibus orbium coelestium have begun work on his new system by that time. Most historians believe that he wrote the "Commentariolus" after his return from Italy, possibly only after 1510. At this time, Copernicus anticipated that he could reconcile the motion of the Earth with the perceived motions of the planets easily, with fewer motions than were necessary in the "Alfonsine Tables", the version of the Ptolemaic system current at the time. In particular, the heliocentric Copernican model made use of the Urdi Lemma developed in the 13th century by Mu'ayyad al-Din al-'Urdi, the first of the Maragha astronomers to develop a non-Ptolemaic
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