1. Use Keplers laws and the period of the
Moon (27.4 d) to determine the period of an artificial satellite orbiting very
near the Earths surface.
2. Determine the mass of the Earth from the
known period and distance of the Moon.
3. Neptune is an average distance of 4.5 X
109km from the Sun. Estimate the length of the Neptunian year using
the fact that the Earth is 1.50 X 108km from the Sun on the average.