Accurate measurement of distances to galaxies is very difficult; each plot below uses a different method. Velocity (in km/s) is accurately measured using the doppler shift. Distances are measured in Megaparsecs (Mpc).

Cepheid variable distance measurements; Hubble's distance measurements have large errors.

Type II Supernova distance measurements of B.P. Schmidt, et. al., 1995 (taken from K&S).

Type Ia Supernova Data of A.G. Riess, et. al., 1998