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. Connections
Associated With
Galaxy redshifts are a principal line of evidence for the expanding universe the Big Bang model describes.
Source Wikipedia (space and spaceflight articles)
Source Wikipedia (space and spaceflight articles)
Source Wikipedia (space and spaceflight articles)
JWST measures the redshift of very distant galaxies in the infrared.
Site of Hubble's 1929 distance-redshift observations.
Source Encyclopedia Britannica: Space Exploration
Source Wikipedia (space and spaceflight articles)
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia FoundationRedshift, History section
Beginning with observations in 1912, Vesto Slipher discovered that the Andromeda
- Associated With: Big Bang Theory
- Associated With: Cosmic Microwave Background
- Associated With: Olbers' Paradox
View the Source 2. Encyclopedia Britannica: Space Exploration
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