'Let there be lights in the heavens to separate the day from the night, and let them serve as signs to mark seasons, days, years and festivals'...the 4th day (of 7)." The #7 is the great recurring numerical theme of the Hebrew (and Christian) scriptures. The menorah's 7 lamps on 6 branches correspond to the lights of the 7 Classical planets: Moon, Mercury, Venus, Sun (4th), Mars, Jupiter, and Saturn. See also Astrology in medieval Islam Philip Berg Christian views on astrology Gematria Hebrew astronomy Jewish astrology Kabbalah Mazzaroth Monen Renaissance magic Sefer Raziel HaMalakh Sefer Yetzirah References Altmann, A. “Astrology,” Encyclopaedia Judaica (Jerusalem: Keter, 1973), vol. 3, pp. 788–795 Amsel, Nachum. The Jewish Encyclopedia of Moral and Ethical Issues", Jason Aronson, 1994 Charlesworth, James H. “Jewish Astrology in the Talmud, the Pseudepigrapha, the Dead Sea Scrolls, and Early Palestinian Synagogues,” Harvard Theological Review 70 (1977), 183-200 Erlanger, Gad. Signs of the Times: the Zodiac in Jewish Tradition (New York, NY: Feldheim, 2001) Julius Guttman. Philosophies of Judaism, JPS. 1964 Kaplan, Aryeh. Sefer Yetzirah: The Book of Creation, Weiser Books, Revised edition (May 1, 1997) Kiener, Ronald. “The Status of Astrology in the Early Kabbalah: From the Sefer Yesirah to the Zohar.” In The Beginnings of Jewish Mysticism in Europe: Proceedings of the Second International Conference on the History of Jewish Mysticism (Jerusalem Studies in Jewish Thought, vol. VI), edited by J. Dan. Jerusalem: Magnes, 1987: 1*-42* (English section). Langermann, Y. Tzvi. "Maimonides Repudiation of Astrology," in Robert S. Cohen, & Hillel Levine (eds.), Maimonides and the Sciences (Dordrecht: Kluwer Academic Press, 2000), pp. 131–157 Ness, Lester. "Jewish Astrology," in Written in the Stars: Ancient Zodiac Mosaics (Warren Center, Pennsylvania: Shangri-La Publications, 1999), pp. 137–174. Pines, Shlomo. "To Behold the Stars and the Heavenly Bodies," Immanuel 20 (1986), pp. 33–37 (also in Shlomo Pines Studies in the History of Jewish Thought (ed. by Warren Zev Harvey and Moshe Idel (Jerusalem: Magnes Press, 1997))) Stuckrad, Kocku von. "Jewish and Christian Astrology in Late Antiquity – A New Approach," Numen 47/1 (2000), pp. 1–40. The Jewish Encyclopedia (1906), Astrology “Gersonides on Astrology, Divination, and Dreams,” in Proceedings, Eighth World Congress of Jewish Studies, Division C, World Union of Jewish Studies, Jerusalem, 1982, pp. 47–52. Divination, Magic and Healing: A Book of Jewish Folklore, Jason Aronson The Mystical Qabalah, Dion Fortune, Samuel Weiser publisher, 1984 Further reading Anderson, Carl. Astrology of the Old