Critical density of a universe is found to be 6×10-27 kg/m. Estimate the value of Hubble constant.
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- What would be the critical density of matter in the universe if the value of the Hubble constant were (a) 40 km/sec/ Mpc? (b) 90 km/sec/Mpc?Assume that the average galaxy contains 1011 MSun and that the average distance between galaxies is 10 million light-years. Calculate the average density of matter (mass per unit volume) in galaxies. What fraction is this of the critical density, 9.6 * 10-27?By what factor would the critical density of the universe today change if the Hubble constant today measured at 5 times greater than what we previously thought?