Experiments with lasers that will help to refine the value of the Hubble constant

In modern astrophysics, it is assumed that the redshift effect in a certain galaxy is caused by only one reason: the speed of removal of this galaxy from us. We believe that the growth of the gravitational potential of the universe, caused by the expansion of the universe, makes an additional contribution to the redshift in the spectrum of each galaxy. This contribution is because photons coming from the past already had a lower frequency at the moment of their birth. It is because they were born in a region of lower gravitational potential. According to our estimations, this contribution is about 1/3 of the observed redshift effect in the spectrum of each distant galaxy. Accordingly, the contribution caused by the Doppler effect is about 2/3. To test these estimations, we propose to carry out two different experiments, each of which will unambiguously either confirm or refute the presence of the effect we predicted. The first experiment will be with a highly stable laser (relative error 10^-16-10^-17) and ideal mirrors, the creation of which MIT announced in 2013. The second experiment uses a ground-based laser and corner reflectors on the Moon. If the predicted effect is confirmed, the results of the experiments will significantly refine modern estimates of the Hubble constant, the age of the Universe, the amount of dark energy and dark matter.