Plate 3: Spectra of Secchi star classes III–IV
- 1870
Fig. 1: Spectrum of "red to orange" stars, particularly Alpha Orion and Antares. Secchi included Alpha Herculis, Beta Pegasi, Alpha Orion, and Antares in this third of four classes of stars.
Fig. 2: Spectrum of "blood-red" or carbon stars, particularly 152 Schjellerup (La Superba).
Fig. 3: Spectrum of "blood-red" or carbon stars, particularly 78 Schjellerup.
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Cite as
Secchi, Angelo. “Plate 3: Spectra of Secchi Star Classes III–IV.” In Le Soleil: Exposé Des Principales Découvertes Modernes Sur La Structure De Cet Astre, Son Influence Dans l'Univers Et Ses Relations Avec Les Autres Corps Célestes. Paris, France: Gauthier-Villars, 1870. https://digital.sciencehistory.org/works/v979v309v.
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