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地球の公転

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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
As seen from the orbiting Earth, the Sun appears to move with respect to the fixed stars, and the ecliptic is the yearly path the Sun follows on the celestial sphere. This process repeats itself in a cycle lasting a little over 365 days.

黄道面とは何か?太陽の通り道と天球座標系の基礎知識

黄道黄道面天球地球の公転
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年(Year)の定義と多様な暦体系天文学的視点から社会的な運用まで

グレゴリオ暦回帰年恒星年
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年(Year)の定義と多様な暦体系天文学的視点から社会的な運用まで

グレゴリオ暦回帰年恒星年