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 (22 February 1824 – 23 December 1907), usually known as Jules Janssen, was a French astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium.
Pierre Jules César Janssen (22 February 1824 – 23 December 1907), usually known as Jules Janssen, was a French astronomer who, along with English scientist...
The Janssen revolver (French: revolver photographique) was invented by the French astronomer Pierre Jules César Janssen in 1874. It was the instrument...
1770-1, Hakluyt Society, p. 3, retrieved 13 January 2013 Speech by PierreJanssen, director of the Paris observatory, at the first session of the Meridian...
Pieter "Pier" Janssen (born 9 September 1956), also referred to as Pierre or Piet, is a Belgian former footballer and manager who played as a midfielder...
undertake detailed research, so he built his permanent cabin. In 1890, PierreJanssen, an astronomer and the director of the Meudon astrophysical observatory...
an English scientist and astronomer. Along with the French scientist PierreJanssen, he is credited with discovering the gas helium. Lockyer also is remembered...
daughter, Yakpwa (nicknamed Yaki), was briefly married to a Belgian, PierreJanssen, who later wrote a book that described Mobutu's lifestyle in vivid detail...
extreme conditions. Helium was discovered in 1868 by French astronomer PierreJanssen, who first detected the substance as an unknown yellow spectral line...
in film involved some significant events. 1874 – French astronomer PierreJanssen used his "photographic revolver" to photograph the transit of the planet...
December 9, 1874, french astronomer PierreJanssen and Brazilian engineer Francisco Antônio de Almeida using Janssen's 'photographic revolver' photograph...
of the Earth's atmosphere due to decay of radioactive potassium-40. PierreJanssen and Joseph Norman Lockyer had discovered a new element on 18 August...
a hydrogen line confirmed that prominences were gaseous in nature. PierreJanssen was also able to detect an emission line corresponding to an at the...
Passage de Venus – A series of photographs taken of the transit by PierreJanssen, listed by IMDb as the first film The timings given here are the geocentric...
Rica A. Lefaivre Minister Plenipotentiary and Consul-General France PierreJanssen Director of the Physical Observatory of Paris France Baron H. von Alvensleben...
Maurice Hamy Michel Hénon Paul Henry and Prosper Henry Pierre Hérigone Gustave-Adolphe Hirn PierreJanssen Odette Jasse René Jarry-Desloges Stéphane Javelle...
observation of solar eclipse of 18 August 1868 by French astronomer, PierreJanssen. Allen Olliver Becker's family from Guntur was among the survivors of...
Zacharias Janssen; also Zacharias Jansen or Sacharias Jansen; 1585 – pre-1632) was a Dutch spectacle-maker who lived most of his life in Middelburg. He...
the westernized intelligentsia and establishment. French astronomer, PierreJanssen observed the Solar eclipse of 18 August 1868 and discovered helium,...
expedition in which a spectroscope was used. J. Norman Lockyer and PierreJanssen are honored for their discovery of the nature of the Sun's prominences...
Carrington discovers the differential nature of solar rotation 1868 — PierreJanssen and Norman Lockyer discover an unidentified yellow line in solar prominence...
identified. Two examples are listed below: In 1868 Norman Lockyer and PierreJanssen independently observed a line next to the sodium doublet (D1 and D2)...
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