Uploaded April 2017 | Updated September 2026, 3 weeks ago
In an expanding universe, light emitted from a distant galaxy is redshifted. The greater the distance, the greater expansion and hence the greater the redshift. Astronomers can use the amount of redshift to determine the distance to a far off galaxy.
In an expanding universe, light emitted from a distant galaxy is redshifted. The greater the distance, the greater expansion and hence the greater the redshift. Astronomers can use the amount of redshift to determine the distance to a far off galaxy.
