Galilean moons century when other inner moons were discovered, and Marius' names became widely used. Galileo was able to develop a method of determining longitude based on the timing of the orbits of the Galilean moons. The times of the eclipses of the moons could be precisely calculated in advance, and compared with local observations on land or on ship to determine the local time and hence longitude. The main problem with the technique was that it was difficult to observe the Galilean moons through a telescope on a moving ship; a problem that Galileo tried to solve with the invention of
Jose the Galilean sins, there is drought in Israel, and such a one as Jose the Galilean prays for rain, the rain cometh straightway" (Yer. Ber. 9b). The popular invocation, "O Jose ha-Gelili, heal me!" survived even to the 10th century. This invocation is condemned by the Karaite Sahal ben Matzliah Jose the Galilean Jose the Galilean (, Rabbi Yose HaGelili), d. 15 Av, was a Jewish sage who lived in the 1st and 2nd centuries CE. He was one of the Tannaim, the rabbis whose work was compiled in the Mishna. Jose was a contemporary and colleague of Rabbis Akiva, Tarfon, and