1925 ⟶ Payne-Gaposchkin Determines Hydrogen Abundance in the Sun
Cecilia Payne-Gaposchkin discovers that hydrogen is the most...
Year
1924
1925
🌌 Hubble Discovers the Milky Way is One of Many Galaxies
Edwin Hubble: the discovery that the Milky Way is just one of many galaxies⟶
AstronomyCosmologyGalaxiesMilky WayHubbleExtragalactic Astronomy20th Century AstronomyUniverse
United States☀️ Payne-Gaposchkin Determines Hydrogen Abundance in the Sun
Cecilia Payne-Gaposchkin discovers that hydrogen is the most abundant element in the Sun's atmosphere, and accordingly, the most abundant element in the universe by relating the spectral classes of stars to their actual temperatures and by applying the ionization theory developed by Indian physicist Meghnad Saha. This opens the path for the study of stellar atmospheres and chemical abundances, contributing to understand the chemical evolution of the universe.⟶
AstronomyAstrophysicsSolar PhysicsHydrogen AbundancePayne-GaposchkinStellar AtmospheresChemical CompositionUniverse
United States
India