Simon Newcomb, William Harkness and the Nineteenth-Century American Transit of Venus Expeditions

@article{Dick1998SimonNW,
  title={Simon Newcomb, William Harkness and the Nineteenth-Century American Transit of Venus Expeditions},
  author={S. Dick and Wayne Orchiston and T. Love},
  journal={Journal for the History of Astronomy},
  year={1998},
  volume={29},
  pages={221 - 255}
}
Grâce a l'observatoire de l'armee navale americaine, Newcomb (S.) et Harkness (W.) ont pu observe le passage de la planete Venus sur le disque solaire au XIX e siecle 
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