- Plural of luminary
The luminaries were what traditional astrologers called the two astrological "planets" which were the brightest and most important objects in the heavens, that is,
The Sun and Moon were well-established rulers of the other planets, in accordance with the ancient doctrine of astrology of sect, which made the Sun the ruler of charts of events and individuals born in the daytime, when the Sun was over the horizon; and the Moon the ruler of night charts, when the Sun was below the horizon.
Ancient astrologers divided all astrological factors into day and night groups: essential dignities, Arabian Parts (or "Lots") and all planetary characteristics. Even each of the Starry planets themselves "belonged" to one luminary or the other. The luminary "in charge" of any given chart was called the luminary of sect. (See sect.)
- ''And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: He made the stars also. And God set them in the firmament of the heaven to give light upon the earth, And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good.'' (Genesis 1:16-18, King James Version)