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Redshift
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Diagram illustrating the Doppler shift in astronomy, showing how absorption lines in a color spectrum move toward violet for approaching objects and toward red for receding objects, with labeled comparison spectra. Galaxy cluster Oval map of the cosmic microwave background radiation from NASA's WMAP mission, showing a mottled pattern of blue, green, yellow, and red representing temperature variations. Distant galactic cluster, as observed by the Hubble Space Telescope.This group consists mainly of irregular galaxies; its red colour is a product of red shift.
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Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
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Redshift: Media

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Doppler shift
Absorption lines in a color spectrum move toward violet for approaching objects and...
Encyclopædia Britannica, Inc.
Galaxy cluster
This cluster is more than seven billion light-years from Earth and provides an image...
Photo AURA/STScI/NASA/JPL (NASA photo # STScI-PR98-27)
Cosmic microwave background
A full-sky map produced by the Wilkinson Microwave Anisotropy Probe (WMAP) showing...
NASA/WMAP Science Team
Distant galactic cluster, as observed by the...
Photo AURA/STScI/NASA/JPL (NASA photo # STScI-PR98-27b)
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