Novae theoricae planetarum, 16th Century

 

 

I found this manuscript –has an amazing set of volvelles- at Penn Libraries , online available with tag LJS 64. The work is titled “Theoricae novae planetarum”, by 15th-century Austrian astronomer Georg von Peurbach, who taught at the universities in Padua and Ferrara. 

The diagrams demonstrate increasingly complex planetary motion (at least for 15^th Century). The Theoricae Novae was an attempt to present Ptolemaic astronomy in a more elementary and comprehensible way. The book was very successful, replacing the older Theoricae Planetarum Communis as the standard university text on astronomy.

Von Peurbach was very precise taking in account 15th Century astronomy resources & instruments: In 1457 he observed an eclipse and noted that it had occurred 8 minutes earlier than had been predicted by the Alphonsine Tables, the best available eclipse tables at the time. He then computed his own set of eclipse tables, the Tabulae Eclipsium (remained highly influential for many years).

About this codex provenance, was formerly owned by Francesco Rolandi of Turin, teacher of mathematics (There is an inscription dated 1655, inside upper cover). After Francesco Rolandi, books had other owners but was finally sold by William Patrick Watson Antiquarian Books (London), cat. 7 (1996), no. 79, to Lawrence J. Schoenberg and Barbara Brizdle, 2011. (link to their manuscript initiative provided).