1912 ⟶ Vesto Slipher Observes Redshifts of Spiral Nebulae
Vesto Slipher: galactic redshifts
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1910
1912
1929
1962
1998
⭐ Williamina Fleming Identifies the First White Dwarf Star
Williamina Fleming: the first white dwarf, 40 Eridani B⟶
AstronomyCosmologyStellar EvolutionAstrophysicsSpectroscopy
United States🔭 Vesto Slipher Observes Redshifts of Spiral Nebulae
AstronomyCosmologyGalaxiesObservational AstronomyExpansion of the UniversePhysics
United States🔭 Henrietta Swan Leavitt Discovers Cepheid Period-Luminosity Relation
AstronomyCosmologyAstrophysicsEdwin Hubble
United States🔭 Hubble Formulates Law of Expanding Universe
Edwin Hubble: Hubble's law of the expanding universe⟶
AstronomyCosmologyEdwin Hubble20th Century ScienceUniverseExpansionSpace
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🔭 Discovery of the Accelerated Expansion of the Universe
Supernova Cosmology Project and the High-Z Supernova Search Team: discovery of the accelerated expansion of the Universe and dark energy⟶
CosmologyAstronomySupernovaUniverseExpansionObservationResearch
United States