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黄道傾斜角

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The positive pole of a planet is defined by the right-hand rule: if the fingers of the right hand are curled in the direction of the rotation then the thumb points to the positive pole. The axial tilt is defined as the angle between the direction of the positive pole and the normal to the orbital plane. The angles for Earth, Uranus, and Venus are approximately 23°, 97°, and 177° respectively.

自転軸の傾き（黄道傾斜角）が惑星の気候と季節に与える影響

自転軸の傾き黄道傾斜角季節のメカニズム地球の公転
2026年8月11日続きを読む →
Precessional movement of Earth. Earth rotates (white arrows) about once a day around its rotational axis (red); this axis itself rotates slowly (white circle), completing a rotation in approximately 26,000 years[1]

地軸の歳差運動地球の回転軸が描く26,000年の巨大なサイクル

歳差運動地軸春分点天文学
2026年8月11日続きを読む →
Location of the northern lunistices from 2006 to 2025

月面停止（ルナスティス）のメカニズムと18.6年周期の天文学的影響

月面停止ルナスティス赤緯主要月面停止
2026年8月11日続きを読む →
Orbital dynamics of the Moon, with exaggerated paths and sizes, particularly illustrating that the Moon's orbit is on average slightly more outbound than inbound around the Sun, perturbed by Earth.[6]

月軌道のメカニズム地球とのダイナミックな相互作用

月軌道地球重心
2026年8月10日続きを読む →