Question 6(Multiple Choice Worth 3 points) (06.02 MC) Two planets are orbiting a star. Planet A is closer to the star than Planet B. Which description explains the expected motion of Planets A and B? The average speed of Planet B is faster than that of Planet A. The average speed of Planet B is equal to that of Planet B. The orbital period of Planet B is shorter than that of Planet A. The orbital period of planet A is shorter than that of Planet B.