Concepts
Redshift
Also Known As Red shift
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The stretching of light toward longer, redder wavelengths as its source moves away from an observer. Edwin Hubble's 1929 observation that more distant galaxies show greater redshift provided the key early evidence that the universe is expanding.
Facts
Concept Domain Formulated YearYear of Edwin Hubble's published relation between galaxy distance and redshift. Cross-Tradition Connections
Associated With
Galaxy redshifts are a principal line of evidence for the expanding universe the Big Bang model describes.
Site of Hubble's 1929 distance-redshift observations.
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