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Big Bang and Alternatives The big bang (BB) theory is widely accepted because redshift in distant objects is seen as evidence for an expanding universe. But how strong are the cases for and against the BB? Are we even sure that redshift corresponds to expansion velocity?
Galaxies Galaxies are the laboratory of cosmology. How is our growing knowledge of galactic structures shaping modern cosmological theory? How is the perception of galactic organization affected by different interpretations of red shift?