Why is measuring redshift considered an immensely powerful technique for gauging cosmological distance?

Answer

Redshift is a measurable property offering a clear metric (higher redshift equals greater distance)

Redshift is a directly measurable property based on spectral lines, providing a clear metric for estimating distance across cosmological scales, unlike attempting direct distance gauging.

Why is measuring redshift considered an immensely powerful technique for gauging cosmological distance?
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