세차운동
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<timefyi-glossary slug="precession"></timefyi-glossary>정의
지구 자전축의 느린 흔들림으로, 약 25,772년(플라톤 년)에 한 바퀴를 완성합니다. 세차운동으로 인해 춘분점이 수천 년에 걸쳐 황도 12궁 별자리를 이동합니다.