Finis origine pendet
"Astronomy, of which we now speak, teaches the laws of the steller world.... which is built up on the investigation of natural phenomena in order to determine the course of the sun, of the moon, and the stars, and to effect a proper reckoning of time."
Freemasons are advised to make the liberal arts and sciences their study. The following links are only a small introduction to information which falls under the classic rubric of Arithmetic. For the most part, they are not masonic sites and the reader is advised that, unless otherwise noted, they do not represent the opinions or positions of this or any Grand Lodge.