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
Table of Newtonian series Table of Newtonian series In mathematics, a Newtonian series, named after Isaac Newton, is a sum over a sequence formula_1 written in the form where is the binomial coefficient and formula_4 is the rising factorial. Newtonian series often appear in relations of the form seen in umbral calculus. The generalized binomial theorem gives A proof for this identity can be obtained by showing that it satisfies the differential equation The digamma function: The Stirling numbers of the second kind are given by the finite sum This formula is a special case of the "k"th forward difference of the monomial "x"