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天球赤道

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The celestial equator is currently inclined by about 23.44° to the ecliptic plane. The image shows the relations between Earth's axial tilt (or obliquity), rotation axis, and orbital plane.

天球赤道とは？地球の傾きと星空の座標系を解説

天球赤道天球黄道地軸
2026年8月11日続きを読む →