Solstice - solstice
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The point on the ecliptic that is 90° east of the vernal equinox is the summer solstice, and the point that is 90° west of the vernal equinox is the winter solstice. These are the two points where the ecliptic and the equator are furthest apart. They correspond to declinations of +23°27′ and -23°27′, respectively. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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黄道上で春分点から東へ 90°の点を夏至点，西へ 90°の点を冬至点，合わせて至点という。これは黄道と赤道が最も離れる 2点である。それぞれ赤緯＋23°27′，－23°27′にあたる。
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