1963 ⟶ Quasars Identified as Distant Active Galaxies
Dutch-American astronomer Maarten Schmidt measures the spect...
Year
1872
1923
1963
1967
⭐ First Photograph of a Star's Spectrum Reveals Chemical Composition
An American astronomer Henry Draper takes the first photograph of the spectrum of a star (Vega), showing absorption lines that reveal its chemical makeup. Astronomers begin to see that spectroscopy is the key to understanding how stars evolve. William Huggins uses absorption lines to measure the redshifts of stars, which give the first indication of how fast stars are moving.⟶
SpectroscopyAstronomyStellar CompositionRedshiftWilliam HugginsHenry DraperAstrophysics19th Century Science
United States
United Kingdom🔭 Hubble Discovers Galaxies
Edwin Hubble: Galaxies discovered⟶
AstronomyCosmologyGalaxiesHubbleExtragalactic Astronomy20th Century AstronomySpaceUniverse
United States🌌 Quasars Identified as Distant Active Galaxies
Dutch-American astronomer Maarten Schmidt measures the spectra of quasars, the mysterious star-like radio sources discovered in 1960. He establishes that quasars are active galaxies, and among the most distant objects in the universe.⟶
AstronomyAstrophysicsQuasarsActive GalaxiesCosmologyRedshiftMaarten Schmidt
NetherlandsUnited States