This photographer, partnership or studio is under consideration
We are seeking any background details and example photographs that will assist us improve this page. If you have any advice or leads please send an email to - email@example.com
If you are this photographer - welcome - and please use the Submission guidelines to make sure we get everything right.
|Born: Pierre Jules César Janssen |
Other: Jules Cesar Janssen
Other: Jules Janssen
Other: Pierre Janssen
Other: Pierre-Jules-César Janssen
|Dates: ||1824, 22 February - 1907, 23 December|
|Born: ||France, Paris|
|Died: ||France, Meudon|
French astronomer and the discover of Helium. He traveled widely for research and on scientific expeditions including - Peru in order to determine the magnetic equator (1857); work on the solar spectrum in Itay (1861-1862,1864), optical and magnetic experiments in the Azores (1867), Transit of Venus - Japan (1874), Transit of Venus - Algeria (1882) and took part in numerous solar ecilpse expeditions uncluding Trani (1867), Guntur (1868), Algiers (1870), Siam (1875), the Caroline Islands (1883), and to Alcosebre in Spain (1905). He was twice President of La Société Française de Photographie (1891-1893, 1900-1902). His "Atlas des photographies solaires" (1904) contained over 6000 photographs.
The National Maritime Museum (Greenwich, UK) has some examples of the plates taken with his "Photographic revolvers" that were used in astronomical work. His experiments influenced E-J Marey and his later work on chronophotography.
| ||Premium content for those who want to understand photography|
References are available for subscribers.There is so much more to explore when you subscribe.
| || |
|Family history |
If you are related to this photographer and interested in tracking down your extended family we can place a note here for you to help. It is free and you would be amazed who gets in touch.