A number that expresses the rate at which the universe expands with time. Ho appears to be between 60 and 75 kilometers per second per megaparsec.

A number that expresses the rate at which the universe expands with time. Ho appears to be between 60 and 75 kilometers per second per megaparsec.

A measure of the rate at which the Universe is expanding. The Hubble Constant relates the apparent recession velocity of a galaxy to its distance from the Milky Way. The precise value of the Hubble Constant is unknown, although independent measurements have established the value of this constant to be between 50 and 80 kilometres per second per meg [..]

Hubble’s law is the statement in astronomy that galaxies move away from each other, and that the velocity with which they recede is proportional to their distance. It leads to the picture of an expanding universe and, by extrapolating back in time, to the Big Bang theory. The law was first formulated by Edwin Hubble in 1929. Hubble compared the dis [..]

(n.) The numerical factor, usually denoted H, that describes the rate of expansion of the universe. It is the proportionality constant in the Hubble law v ~Hd, which relates the speed of recession of [..]

The expansion rate of our universe or rate at which our universe is stretching apart. As of October 2012, the measurement of the Hubble constant is 74.3 kilometers per second per megaparsec (a megapar [..]

A number that expresses the rate at which the universe expands with time. Ho appears to be between 60 and 75 kilometers per second per megaparsec.

(astronomy) a number that expresses the rate of expansion of the universe; the velocity at which a distant object is receding from the Earth divided by its distance; its reciprocal gives the age of [..]