…(3) The descending node of the Moon's equator and the ascending node of the Moon's ecliptic always coincide with each other. These three laws were empirically determined from observations by the 17th-century Italian astronomer G.D. Cassini, and are known as the Cassini Laws. This first law dictates that the Moon always presents the same side to the Earth. … *Some of the terminology explanations that mention "Cassini's Law" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…(3)黄道面に対する月の赤道の降交点と白道の昇交点とはつねに一致している。この三つの法則は,17世紀のイタリアの天文学者G.D.カッシニによって観測結果から経験的に求められたもので,カッシニの法則と呼ばれている。この第1法則から,月は地球に対していつも同じ面を向けていることになる。… ※「カッシニの法則」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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