Hubble constant - Reflexions

Hubble constant

In cosmology, the Hubble constant is the constant of proportionality between the distance and the speed at which distant galaxies are moving further apart from us. The Hubble constant gives the local local expansion rate of the universe. The further away an object is, the more quickly it is moving away from us. But measurement of the Hubble constant remains delicate because of the difficulty associated with precisely calculating the distance of theobserved objects.

According to the commonly-accepted model, the Hubble constant is currently estimated at around 73 kilometers per second per megaparsec (73 Km/s/Mpc). This means that a body at one megaparsec from an observer is moving away at a speed of 73 Km/s. A body at10 Mpc from an observer is moving away at 730 Km/s.