…It is also called the polar midline, or simply the midline. In contrast, when a celestial body passes through the remaining semicircle of the meridian from west to east, it is called the north midline, or the polar nadir. Observing these phenomena is an important part of astronomy, which forms the basis of… *Some of the terminology that refers to the "extremely inferior midline" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…極上正中,あるいは単に正中とも呼ぶ。これに対して,子午線の残りの半円部分を天体が西から東へ通過するときのことを北中,あるいは極下正中という。これらの現象を観測することは,位置天文学の基礎をなす重要な分野である。… ※「極下正中」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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