# What does Hubble's constant measure?

May 2, 2018

Hubble's constant corresponds with distance. Hubble's constant can be measured by velocity (km/s divided by distance (Mpc). It is part of an equation that measures the velocity of celestial bodies rushing away from earth.

#### Explanation:

The velocity is measured by:
$v = {H}_{0} d$

When:
v = velocity in kilometers per second ( $k m {s}^{-} 1$)

${H}_{0}$ = a value of around $70 k m {s}^{-} 1 M p {c}^{-} 1$

d = distance in mega parsec (Mpc)

For example if a typical galaxy is at a distance of 100Mpc, it would be rushing away at 7000 $k m {s}^{-} 1$