dog days

Japanese: dog days(英語表記)dogdays
dog days

…This star is visible in the winter evening sky, but it rises above the eastern horizon before the dawn sun at the beginning of summer, and in ancient Egypt it was believed to be the star that heralds the flooding of the Nile River following the rainy season in the Ethiopian highlands. The name Sirius comes from the Greek word seirios (something that burns), and this is why the summer doyo is called dog days in English. Beta Sirius is also called Mirzam, has a magnitude of 2.0, a spectral type B1, and is located 650 light years away. …

*Some of the terms that refer to "dog days" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この星は冬の宵空に見えるが,明け方太陽に先立って東の地平線に昇るのは夏の初めであり,古代エジプトではエチオピア高地の雨季に続くナイル川のはんらんを告げる星として信仰された。シリウスの名はギリシア語のセイリオス(焼きこがすものの意)から由来したもので,夏の土用を英語でドッグデイズdog daysと呼ぶのもこのことによる。β星はミルザムとも呼ばれ,2.0等でスペクトル型はB1,650光年の距離にある。…

※「dog days」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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