A minimum-energy orbit to an outer planet consists of putting aspacecraft on an

Question

A minimum-energy orbit to an outer planet consists of putting aspacecraft on an elliptical trajectory with the departure planetcorresponding to the perihelion of the ellipse, or closest point tothe Sun, and the arrival planet corresponding to the aphelion ofthe ellipse, or farthest point from the Sun. (a) Use Kepler's third law to calculate howlong it would take to go from Earth to Mars on such an orbit.
1 y

(a) Use Kepler's third law to calculate howlong it would take to go from Earth to Mars on such an orbit.
1 y

Explanation / Answer

secondAttempt's answer is logically correct, but he forgot to cube the Hohmann Transfer (the name of a minimum-energy transfer orbit) distance .  The correct value is 0.709 years.

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