LEMAÎTRE'S Universe and Observations

On the assumption that the expansion of the Universe is described by Lemidtre's model, the observations of the distant quasi-stellar objects give a mean density Po = 1.8 X 10- ' g , a "radius" R, = 1.5 X 1010 lt-yr, a cosmical constant A = 4.3 >c 10-16 cm , an acceleration parameter qo = -1.3, an age to = 67 X 10 years. The difference between this model and the static Einstein universe is very small (1 = 2 >c 10-5). Possibility of further observational confirmations is discussed.