[천문학] 우주론에서 z를 V로 바로 치환하면 안되요!! 수능특강을 듣고 놀라서 올립니다.

Añadido: 2026-05-26

In cosmology, redshift (z) cannot be directly substituted with velocity (v) in graphs because this substitution is only valid in the low-velocity approximation (z << 1). For high-redshift objects in an accelerating universe, using z as v leads to physically incorrect interpretations of cosmic expansion.