天頂の記事

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

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Upper (oK) and lower culmination (uk)

南中（Culmination）の仕組みと天体観測への応用

南中子午線天文学上南中

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Horizontal coordinates use a celestial sphere centered on the observer. Azimuth is measured eastward from the north point (sometimes from the south point) of the horizon; altitude is the angle above the horizon.

地平座標系天体の位置を特定する基本システム

地平座標系高度方位角天文学

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Horizontal coordinates use a celestial sphere centered on the observer. Azimuth is measured eastward from the north point (sometimes from the south point) of the horizon; altitude is the angle above the horizon.

地平座標系天体の位置を特定する基本システム

地平座標系高度方位角天文学

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This modern liquid-mirror telescope aims upward

天頂望遠鏡の仕組みと天文学における役割

天頂望遠鏡天頂天文学液体鏡望遠鏡

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