  The main argument that Universe is currently expanding is observed redshift
increase by distance. However, this conclusion may not be correct, because
cosmological redshift depends only on the scaling factors, the change in the
size of the universe during the time of light propagation and is not related to
the speed of observer or speed of the object emitting the light. An observer in
expanding universe will measure the same redshift as observer in contracting
universe with the same scaling. This was not taken into account in analysing
the SN Ia data related to the universe acceleration. Possibility that universe
may contract, but that the observed light is cosmologically redshifted allows
for completely different set of cosmological parameters $\Omega_M,
\Omega_{\Lambda}$, including the solution $\Omega_M=1, \Omega_{\Lambda}=0$. The
contracting and in the same time accelerating universe explains observed
deceleration and acceleration in SN Ia data, but also gives significantly
larger value for the age of the universe, $t_0 = 24$ Gyr. This allows to
reconsider classical cosmological models with $\Lambda =0$. The contracting
stage also may explain the observed association of high redshifted quasars to
low redshifted galaxies.
