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黄道座標系

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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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