…He went out to observe solar eclipses eight times between 1868 and 1905. In 1868, independently of the French P.J.C. Janssen (1824-1907), he devised a method for observing the prominence of the sun even during non-eclipses. In the same year, he discovered a previously unknown spectral line in the solar atmosphere, which he named helium. … *Some of the terminology referenced in "Janssen, PJC" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1868‐1905年にかけて8回も日食の観測に出かける。1868年フランスのジャンサンP.J.C.Janssen(1824‐1907)とは独立に,日食時以外でも太陽の紅炎を観測する方法を考案する。同年太陽大気中に未知のスペクトル線を発見し,ヘリウムと命名した。… ※「Janssen,P.J.C.」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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