ब्रह्मांडीय विस्तार दर कैलकुलेटर — सूत्र

How the Cosmic Expansion Rate Works

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

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.

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