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 Eclipse, or the Courtship of the Sun and Moon The Eclipse, or the Courtship of the Sun and Moon The Eclipse: Courtship of the Sun and Moon (originally L'éclipse du soleil en pleine lune) is a French silent film made in 1907 by director Georges Méliès. A professor of astronomy gives a lecture instructing on an impending solar eclipse. The class rushes to an observation tower to witness the event, which features an anthropomorphic Sun and Moon coming together. The Moon and the Sun lick their lips in anticipation as the eclipse arrives, culminating in a romantic encounter between the two celestial bodies. Various heavenly bodies, including planets and