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 House of the Rising Sun no clear relationship between the two songs. Lomax proposed that the location of the house was then relocated from England to New Orleans by white southern performers. However, Vance Randolph proposed an alternative French origin, the "rising sun" referring to the decorative use of the sunburst insignia dating to the time of Louis XIV, which was brought to North America by French immigrants. "House of Rising Sun" was said to have been known by miners in 1905. The oldest published version of the lyrics is that printed by Robert Winslow Gordon in 1925, in a column "Old Songs That Men