Author Question: Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a ... (Read 75 times)

sarasara · **on:** Jul 27, 2018

Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 20 km/s/Mly. How fast would a galaxy 1000 Mly distant be receding from us?

A) 20,000 km/s
B) 20 Mly/s
C) 0.20 times the speed of light
D) 50 km/s
E) 20 km/s

Question 2

Compared to Earth, Venus spins very rapidly on its axis.

Indicate whether the statement is true or false