 "Precession" is derived from the Latin "praecedere" ("to precede, to come before or earlier"), while "procession" is derived from the Latin "procedere" ("to march forward, to advance").Generally the term "procession" is used to describe a group of objects moving forward.The stars viewed from Earth are seen to proceed from east to west daily, due to the Earth's diurnal motion, and yearly, due to the Earth's revolution around the Sun.