Raphael Levi Hannover
Who was Raphael Levi Hannover?
German astronomer and mathematician
Biographical data adapted from Wikipedia’s article on Raphael Levi Hannover (CC BY-SA 4.0).
Biography
Raphael Levi Hannover (1685 – May 17, 1779) was a German Jewish mathematician and astronomer who combined traditional Jewish scholarship with Enlightenment-era science. Born in Weikersheim, Franconia, he was the son of Jacob Joseph. He got his early education at the Jewish school of Hanover and continued at the yeshivah in Frankfurt am Main. This background melded deep Talmudic learning with a scientific curiosity that marked his later work.
After finishing his education, Hannover worked as a bookkeeper for Simon Wolf Oppenheimer’s firm in Hanover. There, his talents caught the eye of Gottfried Wilhelm Leibniz, the well-known philosopher and mathematician. Hannover became one of Leibniz's most notable students and lived near him for about three years, eventually working as his secretary. This association with one of the top intellectuals of the time gave Hannover access to advanced mathematical and astronomical ideas, influencing his scholarly work for many years.
After his time with Leibniz, Hannover became a teacher of mathematics, astronomy, and natural philosophy. He also exchanged letters with Moses Mendelssohn, a key Jewish philosopher and leading figure of the Haskalah, the Jewish Enlightenment. This network placed Hannover at the crossroads of German scientific culture and the growing movement toward Jewish intellectual modernization.
Hannover's main scholarly contributions were in astronomical calculations for the Jewish calendar. His work Luḥot ha-Ibbur features astronomical tables designed specifically for calculating the Jewish calendar, published alongside M. E. Fürth's Yirat Shamayim, a commentary on Maimonides' Yad, focusing on the Kiddush ha-Hodesh section about the sanctification of the new month. His other major work, Tekunat ha-Shamayim, deals with astronomy and calendar-making, with glosses by Moses Tiktin on related Talmudic passages. An enlarged revision of Tekunat ha-Shamayim, along with two more astronomical works, remained unpublished.
Hannover lived to ninety-four, passing away in Hanover on May 17, 1779. His long life allowed him to see the early German Enlightenment and the start of the Haskalah movement. His career showed a common trend among learned Jews of his time, who aimed to blend traditional religious scholarship with contemporary European scientific methods and findings.
Before Fame
Raphael Levi Hannover was born in 1685 in Weikersheim, a small town in what is now southwestern Germany. As a young man, he followed a common path for scholarly Jews at the time. He first attended the Jewish community school in Hanover and then studied advanced religious subjects at the yeshivah in Frankfurt am Main. This combination of Hebrew texts and community learning set the stage for his later work in science.
His shift from traditional religious education to the broader field of European science was influenced by practical circumstances. While working as a bookkeeper for the Hanover commercial house of Simon Wolf Oppenheimer, Hannover met Gottfried Wilhelm Leibniz, who noticed his talent for math. This chance meeting with one of the era's brilliant minds changed Hannover's path, introducing him to the fields of mathematics and astronomy that he would focus on for the rest of his intellectual life.
Key Achievements
- Compiled Luḥot ha-Ibbur, a set of astronomical tables for computing the Jewish calendar
- Authored Tekunat ha-Shamayim, a systematic treatment of astronomy and calendar-making drawing on Talmudic sources
- Studied under and served as secretary to Gottfried Wilhelm Leibniz
- Taught mathematics, astronomy, and natural philosophy, helping to disseminate Enlightenment-era science within Jewish intellectual circles
- Maintained scholarly correspondence with Moses Mendelssohn, contributing to the early Haskalah discourse
Did You Know?
- 01.Hannover lived to the age of ninety-four, making him one of the longer-lived scholars of the eighteenth century.
- 02.He served as personal secretary to Leibniz and lived near the philosopher for approximately three years.
- 03.His astronomical tables, Luḥot ha-Ibbur, were designed specifically to aid in calculating dates according to the Jewish lunisolar calendar.
- 04.He corresponded with Moses Mendelssohn, connecting him to the early Haskalah, the Jewish Enlightenment movement.
- 05.An enlarged revision of his major work Tekunat ha-Shamayim, along with two other astronomical treatises, was never published and survives only in manuscript form.