Recall that Hubble's law is written v = H0 d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 55 km/s/Mpc. How fast would a galaxy located 500 megaparsecs distant be receding from us?
To find the recession velocity of a galaxy located 500 megaparsecs away, we can use the equation v = H0 * d.
Given:
H0 = 55 km/s/Mpc
d = 500 Mpc
Substituting the values into the equation, we have:
v = 55 km/s/Mpc * 500 Mpc
Multiply the numbers:
v = 55 * 500 km/s
v = 27500 km/s
Therefore, a galaxy located 500 megaparsecs away would be receding from us at a velocity of 27500 km/s.