Final answer:
Gunter's Quadrant was invented by Rabbi Levi ben Gershon, also known as Gersonides, in the early 14th century. He was a Jewish scholar from Provence, southern France. Margaret Geller is a notable figure in modern astronomy but her work is unrelated to Gunter's Quadrant.
Step-by-step explanation:
The Gunter's Quadrant was created by an individual known as Rabbi Levi ben Gershon, also referred to as “Gersonides.” This device was likely invented in the early 14th century, during the period in which Rabbi Levi ben Gershon lived, which was from 1288 to 1344. He was a Jewish scholar based in Provence, southern France. Gersonides is renowned for his contributions to astronomy, mathematics, and philosophy. On a separate note, it is worth mentioning the astronomical work of Margaret Geller, although unrelated to Gunter's Quadrant, Geller's significant contributions to modern astronomy include mapping the three-dimensional structure of the universe, which aligns with the broad theme of astronomical tools and discoveries.