From the beginning Seventh-day Adventists have had an interest in certain elements of astronomy as they relate to certain aspects of their teaching: 1. Chronology. Seventh-day Adventists inherited their chronology of the 2300 prophetic days from the Millerites, who had cited for it the canon, or king list, of the ancient astronomer Ptolemy as well as the ancient lunisolar calendar. 2. The Sabbath . Advocacy of the Sabbath often evokes the demand for an explanation of certain problems, such as the phenomenon of the day beginning at the date line and traveling with sunset round the rotating globe; of the sunset reckoning of the Sabbath in the polar regions, which is connected with the inclination of the earth’s axis; of the continuity of the week ( see Sabbath, VI ; Week ). Astronomical cy...

From the Seventh-day Adventist Encyclopedia. Published with permission from the Review and Herald Publishing Association.