Kepler’s Law Worksheet

1. Earth takes 365 days to complete one orbit around the Sun. Its semi-major axis, a, is 150 million kilometers. What is the mass of the Sun?

2. Jupiter’s moon Europa orbits Jupiter from an average distance of 670,900 km. It takes 3.55 days to complete one orbit. What is the mass of Jupiter?

3. The Moon takes 27.3 days to orbit the Earth. What is the Moon’s orbital distance? (Hint: the back cover of your Holt book gives you some info you will need).