Quiz 19b

The Whirlpool Galaxy (M51) is moving away from us at about 700 km/s. If this recession velocity is interpreted as the result of Hubble expansion, what is the distance to this galaxy?

  1. 700 Mpc
  2. 70 Mpc
  3. 10 Mpc
  4. 1 Mpc
  5. There is not enough information.