. Part C - Kepler's Law of Periods : Semimajor Exp G Mass Star Mass Planet Mass Period T Axis " a" ?i ? Values M (? ) m (?) (days) (miles) '? $ . ?a?' 1 Sun mass 1 Earth mass 1.5 Sun mass 1 Earth mass 2 Sun mass 1 Earth mass 1 Sun mass 1.5 Earth mass 1 Sun mass 2 Earth mass . Average ?29% = 2i ? . Accepted (given) ? Am, = ?. ??? x ?? . % Error =