皮埃尔·让森

天文台拍攝的和的可拆卸。]]

皮埃爾·朱爾·塞薩爾·讓森（，）是一位法國天文學家，他和英國科學家約瑟夫·諾曼·洛克耶一起被認為是發現太陽色球層的氣態性質，並且發現氦這種元素。

生活、工作和興趣
注釋和參考文獻
進階讀物
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• [http://adsabs.harvard.edu/abs/1908PA.....16...72M Obituary], from Popular Astronomy, 1908, vol. 16, pp. 72–74
• [http://adsabs.harvard.edu/abs/1908AN....177...63P Obituary], from Astronomische Nachrichten, 1908, vol. 177, p. 63 (in French)
• [http://adsabs.harvard.edu/abs/1908ApJ....28...89D Obituary], from The Astrophysical Journal, 1908, vol. 28, pp. 89–99 (in French)
• [http://articles.adsabs.harvard.edu/full/1922Obs....45..175. Janssen statue] , description and black-and-white picture from The Observatory, 1922, vol. 45, pp. 175–176
• [https://web.archive.org/web/20060523071018/http://www.hao.ucar.edu/Public/education/bios/janssen.html Brief biography], from the High Altitude Observatory at Boulder, Colorado

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