Photograph of the Nebula in Orion, taken by Professor Henry Draper, M.D., March 11th, 1881. Exposure 104 minutes. (titre original)

inconnu, “Photograph of the Nebula in Orion, taken by Professor Henry Draper, M.D., March 11th, 1881. Exposure 104 minutes. (titre original),” Bibliothèque numérique - Observatoire de Paris, consulté le 23 novembre 2024, https://bibnum.obspm.fr/ark:/11287/1tgXM.