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
Emperor and Galilean Emperor and Galilean Emperor and Galilean (in ) is a play written by Henrik Ibsen. Although it is one of the writer's lesser known plays, on several occasions Henrik Ibsen called "Emperor and Galilean" his major work. "Emperor and Galilean" is written in two complementary parts with five acts in each part and is Ibsen's longest play. The play is about the Roman Emperor Julian the Apostate. The play covers the years 351–363. Julian was the last non-Christian ruler of the Roman Empire. It was his desire to bring the empire back to its ancient Roman values. Another crucial and