1910 ⟶ Williamina Fleming Identifies the First White Dwarf Star
Williamina Fleming: the first white dwarf, 40 Eridani B
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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🔭 Hubble Space Telescope Launched
April 24 – May 20: Launch of the Hubble Space Telescope.⟶
Space ExplorationAstronomyTelescopesNASAAstrophysicsCosmologySpace Race
United States