Article ID: CBB044163460

Henri Deslandres: From Molecular to Solar Physics (2023)

unapi

Henri Deslandres was one of the first French astrophysicists. Aged 28, he left a promising military career for research on molecular spectra and later on the atmosphere of the Sun. He developed a considerable instrumentation in both domains. In particular, he conceived and built several generations of spectroheliographs at Paris, then Meudon Observatories, and initiated a systematic patrol of solar activity and solar-terrestrial relations that has survived to this day. He directed Meudon Observatory from 1908 to its merging with Paris Observatory in 1926, and was also Director of the merged institutions until his retirement in 1928. In this paper, I concentrate on his work on the Sun, in which he showed considerable qualities as an instrument builder, an organizer and an observer, although he was not so successful in interpreting observations. I leave to others a study of his considerable, life-long work on molecular spectra.

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Authors & Contributors
Débarbat, Suzanne
Jean-Marie Malherbe
Batten, Alan H.
Brody, Judit
Chambers, John
Figueirôa, Silvia Fernanda de Mendonça
Journals
Journal of Astronomical History and Heritage
Journal for the History of Astronomy
Nuncius: Annali di Storia della Scienza
Archives Internationales d'Histoire des Sciences
Centaurus: International Magazine of the History of Mathematics, Science, and Technology
Historical Studies in the Natural Sciences
Publishers
Princeton University Press
Floris Books
Reaktion Books
Springer
Concepts
Sun
Astrophysics
Astronomy
Solar astronomy
Physics, solar
Stars; stellar astronomy
People
Deslandres, Henri-Alexandre
Costa Lobo, Francisco Miranda da
Frénicle de Bessy, Bernard
Herschel, William
Janssen, Jules
Leme, Alberto Betim Paes
Time Periods
19th century
20th century, early
20th century
20th century, late
21st century
17th century
Places
France
Paris (France)
Portugal
Brazil
Italy
United States
Institutions
Observatoire de Paris
Académie des Sciences, Paris
Académie Royale des Sciences (France)
American Astronomical Society
Coimbra. Universidade
Observatório Astronómico de Coimbra
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