A distant galaxy was found to have a redshift of 1.8. How far away is the galaxy? Express you answer in Mpc units. You can assume that the galaxy has zero peculiar velocity and that the Hubble constant is 70 km/s/Mpc. Solution the distance is calculated as follows: z = HD D = z/H = 1.8 km/s / 70 km/s/Mpc. = 0.0257 Mpc.