The innermost moon of Jupiter orbits the planet with a radius of 422 ˛ 103 km and a period of 1.77 days. What is the mass of Jupiter?

Newton's law of universal gravitation: Every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distances between them. This force acts along the line joining the two particles.