Title
The astronomical observations on the measurement of Diurnal arcs, drawn circa1840
Caption
Illustration depicting the astronomical observations on the measurement of Diurnal arcs, drawn circa 1840. In astrology, a diurnal arc is the time, as expressed in right ascension, it takes a planet, point, or degree to move from its rising point to its setting point. This takes place in many celestial bodies such as the sun and moon. Dated 19th Century
Date
20th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP23A13_419
License type
Rights managed
Available size
60,0Mb (2,2Mb) / 11,3in x 20,6in / 3396 x 6175 (300dpi)