Wikipedia
Astrotheology is the study of the astronomical origins of religion; how gods, goddesses, and demons are personifications of astronomical phenomena such as lunar eclipses, planetary alignments, and apparent interactions of planetary bodies with stars.
The term astro-theology appears in the title of a 1714 work by William Derham, Astro-theology: or, A demonstration of the being and attributes of God, from a survey of the heavens based on the author's observations by means of "Mr. Huygens' Glass". Derham thought that the stars were openings in the firmament through which he thought he saw the Empyrean beyond. The 1783 issue of The New Christian's magazine had an essay entitled Astro-theology which argued the "demonstration of sacred truths" from "a survey of heavenly bodies" in the sense of the watchmaker analogy. Edward Higginson (1855) argues a compatibility of "Jewish Astro-theology" of the Hebrew Bible, which places God and his angelic hosts in the heavens, with a "Scientific Astro-theology" based on observation of the cosmos.
Manly P Hall (1901–1990), mystic and a 33rd degree mason, taught that each of the three Abrahamic faiths has a planet that governs that religion. Judaism is Saturn: the symbol of Judaism is a hexagram symbol of Saturn, and the day of worship is on Saturday, day of Saturn. Christianity is the Sun: the symbol of Christianity is the cross symbol of the Sun, and the day of worship is Sunday, day of the Sun. Islam is Venus: the symbol of Islam is the star and crescent (the star commonly thought to represent Venus), and the day of worship is on Friday.
Dorothy M. Murdock a proponent of the study, has released books on the subject and teaches the connections between the solar allegory and the life of Christ. She also goes beyond the astronomical comparisons and postulates ties between the origins of many of the early Abrahamic religions to ancient mythologies of that in Egypt, Rome, and Greece.
The same term is used by Jan Irvin, Jordan Maxwell and Andrew Rutajit (2006) in reference to "the earliest known forms of religion and nature worship", advocating the entheogen theory of the origin of religion.