Which statement is NOT true about the vernal and autumnal equinoxes?

The statement concerning the motion of stars differing on the equinoxes is not accurate. On both the vernal (spring) and autumnal (fall) equinoxes, the Earth's tilt is such that the sun is positioned directly above the equator. As a result, day and night are approximately equal in length across the globe, which is a defining characteristic of these equinoxes.

Regarding the motion of stars, the equinoxes themselves do not change the path or motion of stars in the night sky. The apparent motion of stars is primarily affected by the rotation and revolution of the Earth, as well as its axial tilt, but those dynamics remain consistent regardless of the equinox. During both equinoxes, the visible stars do not exhibit any unique motion or behavior compared to their appearance at other times of the year.

Therefore, while the equinoxes signify a change in seasons and occur twice annually, they do not influence the observable motion of stars in a way that sets them apart from other times of the year. Hence, option D is the statement that is not true about the vernal and autumnal equinoxes.