planetary precession of the equinoxes行星岁差
the precession of the equinoxes分点岁差;岁差
the precession of equinoxes被称作分点岁差
N(名词) the slightly earlier occurrence of the equinoxes each year due to the slow continuous westward shift of the equinoctial points along the ecliptic by 50 seconds of arc per year. It is caused by the precession of the earth's axis around the ecliptic pole, with a period of 25800 years 分点岁差