- Jules Janssen; photograph by Nadar (date unknown). Photo taken by Janssen, from the Meudon observatory, of Renard and Krebs' La France dirigible (1885).
- Pierre Jules César Janssen (d. 22 Şubat 1824, Paris – ö. 23 Aralık 1907, Meudon), genelde Fransızca Jules Janssen adıyla bilinen Fransız bir astronomdur.
- Pierre Janssen ist ein ehemaliger Fußballspieler aus Belçika.
- Pierre Jules César Janssen, 18 Ağustos 1868'de yeryüzünde daha önce görülmemiş bir element olan helyumu, Güneş spektrumunda gözlemleyen ilk kişi oldu.
- Pierre Janssen was a French astronomer who in 1868 discovered the chemical element helium and how to observe solar prominences without an eclipse.
- From the brightness of the spectral lines, Janssen realized that the chromospheric spectrum could be observed even without an eclipse, if only he could just...
- Pierre Janssen was a French astronomer known for discovering the chemical element helium, and for his solar eclipse observations.
- 18 Ağustos 1868 - Fransız astronom Pierre Janssen helyum elementini keşfetti. Helyum, en hafif gazlardan biri ve soy gaz ailesinin bir üyesi.
- The time has come to shed light on the phenomenon of Pierre Janssen in this documentary.
- Pierre JANSSEN | Cited by 84 | of Université Libre de Bruxelles, Brussels (ULB) | Read 5 publications | Contact Pierre JANSSEN.
