1932 ⟶ Jansky Discovers Sagittarius A
Karl Guthe Jansky discovers the first astronomical radio sou...
Year
1923
1932
1967
🌠 Hubble discovers galaxies beyond our own
Edwin Hubble discovers a Cepheid variable star in the "Andromeda Nebula" and proves that Andromeda and other nebulas are galaxies far beyond our own. By 1925, he produces a classification system for galaxies.⟶
HubbleGalaxiesCosmologyAndromedaAstronomy20th Century AstronomyExpanding Universe
United States🔭 Hubble Discovers Galaxies
Edwin Hubble: Galaxies discovered⟶
AstronomyCosmologyGalaxiesHubbleExtragalactic Astronomy20th Century AstronomySpaceUniverse
United States🌌 Jansky Discovers Sagittarius A
Karl Guthe Jansky discovers the first astronomical radio source, Sagittarius A⟶
Radio AstronomyJanskySagittarius AGalactic CenterAstronomyAstrophysicsCosmic Radio Sources20th Century Astronomy
United States📡 Jansky Detects Radio Waves from Space
Karl Jansky detects the first radio waves coming from space. In 1942, radio waves from the Sun are detected. Seven years later radio astronomers identify the first distant source – the Crab Nebula, and the galaxies Centaurus A and M87.⟶
Radio AstronomyJanskyCosmic Radio WavesAstronomyAstrophysicsCrab NebulaCentaurus AM8720th Century Astronomy
United States🧲 Chadwick Discovers the Neutron
James Chadwick discovers the neutron.⟶
Nuclear PhysicsNeutronChadwickAtomic StructureSubatomic ParticlesParticle PhysicsNuclear Reactions20th Century Physics
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