1912 ⟶ Henrietta Swan Leavitt Discovers Cepheid Period-Luminosity Relation
Henrietta Swan Leavitt: Cepheid variable period-luminosity r...
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⭐ Williamina Fleming Identifies the First White Dwarf Star
Williamina Fleming: the first white dwarf, 40 Eridani B⟶
AstronomyCosmologyStellar EvolutionAstrophysicsSpectroscopy
United States🔭 Henrietta Swan Leavitt Discovers Cepheid Period-Luminosity Relation
AstronomyCosmologyAstrophysicsEdwin Hubble
United States⚛️ Cecilia Payne-Gaposchkin Determines Solar Composition and Hydrogen Abundance
Cecilia Payne-Gaposchkin: Discovery of the composition of the Sun and that hydrogen is the most abundant element in the Universe⟶
AstronomyCosmologyAstrophysicsElements20th Century Science
United States📡 Karl Jansky Detects Radio Waves from the Milky Way Center
Karl Guthe Jansky discovers the first astronomical radio source, Sagittarius A⟶
AstronomyRadio AstronomyAstrophysicsCosmologyMilky Way
United States🔭 Discovery of Scorpius X-1, the First Cosmic X-Ray Source
Riccardo Giacconi and his team discover the first cosmic x-ray source, Scorpius X-1⟶
AstronomyAstrophysicsCosmologySpace ExplorationObservational Astronomy
United States🔭 Arno Penzias and Robert Wilson Detect Cosmic Microwave Background Radiation
Arno Penzias and Robert Woodrow Wilson: detection of CMBR providing experimental evidence for the Big Bang⟶
CosmologyRadio AstronomyAstrophysicsExperimental Physics
United States