Tying Redshift to Distance

Tying Redshift to distance involves understanding that the universe is expanding, stretching light from distant galaxies toward the red end of the spectrum. The greater the redshift, the faster the galaxy is moving away, indicating it’s farther from us. By measuring a galaxy's redshift, astronomers can estimate how far away it is using the known relationship between speed and distance. This method helps map the universe’s structure, showing that distant galaxies are moving away rapidly, supporting the idea of an expanding cosmos.