The Hubble constant was actually about 100, de Vaucouleurs said, which would make the universe half as large and only about 10 billion years old. 10 billion years What evidence do we have that the universe is expanding? If the Hubble constant is 100 km/s/Mpc, to the first approximation how old is the universe? For example, if the Hubble Constant was determined to be 50 km/s/Mpc, a galaxy at 10 Mpc, would have a redshift corresponding to a radial velocity of 500 km/s. Given Sandage's eminence in the field, de Vaucouleurs's claims were at first met with alarm and disbelief. Using only WMAP data, the Hubble constant is estimated to be 70.0 km/sec/Mpc (give or take 2.2 km/sec/Mpc), also a 3% measurement.

The current best direct measurement of the Hubble constant is 73.8 km/sec/Mpc (give or take 2.4 km/sec/Mpc including, both random and systematic errors), corresponding to a 3% uncertainty.

The Hubble Constant is typically expressed in units of. ... What major problem would arise if the value of Hubble's constant turned out to be 100 km/s/Mpc? According to Hubble's law, how old is the universe (H0 = Hubble's constant)?

Age = 1/H0. An Introduction to Physical Science (14th Edition) Edit edition.

... Who first proposed that the observed motion of galaxies away from us Problem 11E from Chapter 18: Suppose that the Hubble constant had a value of H = 100 km/s... Get solutions

H = km/sec/MLY (km per sec per million light years) or H = km/sec/Mpc (km per sec per million parsecs) This is a length divided by a time divided by a length so has units of 1 over time, but the two lengths are in different units.

But this is not the first time scientists are quarrelling over Hubble’s constant and the US space agency said the figure varied widely over the past decades between 50 and 100 km/s/Mpc.