Based on his data in Figure 31.12, Hubble proposed that the velocity v of a galaxy relative to the Earth is related to its distance d from the Earth by what is now known as Hubble’s law (Eq. 31.5). The red shift of light from the most distant galaxies known gives a relative velocity of about v = 0.96c. What is their distance from the Earth? 

v = H₀d (31.5)

Figure 31.12