Ipub) 2. a planet's seasonal changes are primarily due to the tilt of its rotation axis relative to the plane of the orbit around the sun. the inclination of the axis causes sunlight to strike the surface at a changing angle throughout the year. complete parts a -1. a. what other terrestrial planet's axis of rotation is inclined by approximately the same amount as that of mars and therefore experiences similar seasonal changes? b. which planet has seasons of longer duration, your answer to part a or mars? explain.