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A tired light/contracting universe (TLCU) model is shown to be an excellent fit\udto the redshift/distance modulus data for the 580 supernovae 1a in the Union2.1\udcompilation. The data reveal that the Milky Way is in a static region with a radius\udof about 450Mpc. Beyond the static region the universe is contracting with a space\udvelocity which is linearly proportional to distance over the whole range of the data\ud(k = -7.6 ± 2.3 km s−1 Mpc−1\ud). The other constant of the model is the Hubble\udconstant for which a value of H = 69.51 ± 0.86 km s−1 Mpc−1\udis obtained. The fit\udof the TLCU model to the Union2.1 data is at least as good as the fit of the two\udconstant ΛCDM model to the same data.\udA formula for photon travel distance is derived and an experiment for the possible\uddetection of the tired light process is proposed

A Tired Light/Contracting Universe Model from the Union2.1 Supernovae Data