Alphabetical List‎ > ‎C‎ > ‎

Louis Ferdinand Cruls

Louis Ferdinand Cruls, Belgian-born Brazilian astronomer and geodesist (Diest 21 January 1848 - Paris 21 June 1906)

 
 
ACHIEVEMENTS
 
Determined the rotation period of Mars and measured apparent semi diameter of this planet

 
Saw the Great Comet of 1882 that was known as Cruls Comet (discovered by English-Australian astronomer Ellery)


Proposed formulae for magnetic declination as a function of time


Methode graphique pour la determination des heures approchées des éclipses du soleil et des occultations (1894)


Methodo para determinar as horas das occultações de estrellas pela lua baseado sobre o conhecimento exacto do instante da conjuncção apparente dos dous astros (1899)


Invented a differential barometer

 
Organized Dictionnaire Climatologique Universelle reckoning on scientists of world renown 

 
 
HONORS
 
Valz Medal, Academie de Sciences de Paris (1882) for his work on spectroscopical analysis in the study of comets

Cruls Crater (in Mars)