ちへいざひょう
地平座標
1. horizontal coordinates
2. Horizontal coordinate systemThe horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental plane. This coordinate system divides the sky into the upper hemisphere where objects are visible, and the lower hemisphere where objects cannot be seen since the earth is in the way. The great circle separating hemispheres is called celestial horizon or rational horizon. The pole of the upper hemisphere is called the zenith.
Read “Horizontal coordinate system” on English Wikipedia
Read “地平座標” on Japanese Wikipedia
Read “Horizontal coordinate system” on DBpedia
Read “Horizontal coordinate system” on English Wikipedia
Read “地平座標” on Japanese Wikipedia
Read “Horizontal coordinate system” on DBpedia
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