The astronomer who first solved the problem of the strange red-shifts seen in quasar spectra and thus helped us understand that the quasars must be distant objects was

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Maarten Schmidt first solved the problem of the strange red-shifts seen in quasar spectra and identified them as distant objects in 1963. Carl Sagan was a famous astronomer but did not make significant contributions to the study of quasars in relation to red-shifts. Edwin Hubble made important discoveries about the expanding universe and the distances to galaxies, but he did not study quasars. S. Chandrasekhar was a famous astrophysicist who made important contributions to stellar structure, but he did not work on quasars. Vesto Slipher also studied the spectra of galaxies and made important discoveries about their motions, but he did not work specifically on quasars.

The Astronomer Who First Solved the Problem of the Strange