哈勃距离计算器 — 公式

Hubble's Law

v = H0 × d or equivalently d = v / H0

  • *v* = recession velocity (km/s)
  • *H0* = Hubble constant (≈70 km/s/Mpc)
  • *d* = distance in megaparsecs

    • This linear relation holds well for galaxies not too far away (z < 0.1). For larger distances, cosmological models are needed.

    计算示例

    A galaxy recedes at 7 000 km/s with H0 = 70 km/s/Mpc.

    1. d = v / H0 = 7000 / 70 = 100 Mpc
    2. In Mly: 100 × 3.262 = 326.2 million light-years