!!!Hagen, Johann Georg

Hagen, Johann Georg, b. Bregenz (Vorarlberg), March 6, 1847, 
d. Rome (Italy), Sept. 5, 1930, Jesuit, astronomer, from 1888 
director of the planetarium in Washington, from 1906 of the 
planetarium in the Vatican. Discovered the interstellar phenomenon of 
"Dark Nebula" (also called "Absorption Nebula") named after him in 
German which was later discovered to be an optical illusion. Improved 
astronomical photography, discovered mechanical proof for the rotation 
of the earth and attempted the exploration of variable stars.

!Works
Atlas stellarum variabilium, 8 vols., 1899-1927; Synopsis 
der hoeheren Mathematik, 3 vols., 1891-1905; Die veraenderl. 
Sterne, 2 vols., 1924.

!Literature
OeBL; NDB.


%%language
[Back to the Austrian Version|AEIOU/Hagen,_Johann_Georg|class='wikipage austrian']
%%

[{FreezeArticle author='AEIOU' template='Lexikon_1995_englisch'}]
[{ALLOW view All}][{ALLOW comment All}][{ALLOW edit FreezeAdmin}]