Cosmic Expansion Rate Rechner — Formel

How the Cosmic Expansion Rate Works

Edwin Hubble discovered that galaxies recede from us at speeds proportional to their distance.

Hubble-Lemaitre Law

v = H0 * d

  • *H0* is the Hubble constant (around 70 km/s/Mpc)
  • *d* is the co-moving distance in megaparsecs

    • This linear relation holds for nearby galaxies; at cosmological distances, corrections from the Friedmann equations are needed.

    Lösungsbeispiel

    A galaxy sits 100 Mpc away with H0 = 70 km/s/Mpc.

    1. v = H0 * d
    2. v = 70 * 100
    3. v = 7 000 km/s