17
The
Hubble Law using galaxies with visible
Cepheid variables.
from
a recent paper by Wendy Freedman and coworkers,
using the Hubble Space Telescope
using the Hubble Space Telescope
vr=H´d
H is »75 km/s/Mpc
Example:
If galaxy is 10 Mpc away it is moving at 750 km/s
If galaxy is moving at 1500 km/s
it is 20 Mpc away