Halley's comet has a sidereal period of 76.2 years. Determine the value of the semimajor axis of its orbit. (Use Kepler's third law.)
What percentage of the total mass of the nine planets exists in Jupiter?
Suppose a small, new planet were discovered at a distance of 4 AU from the Sun. According to Kepler's third law, what would be its period?
Calculate the value of the constant k in Kepler's harmonic law, using values for Earth from Table 16.1 in the textbook (1 year can be used for the period, and 1 AU can be used for the mean distance to the Sun).