What is important in Hubble's discovery about the red shift in the spectra of galaxies? a. It proves the Big Bang theory. b. It suggests the existence of black holes. C. It suggests that the universe is expanding. d. It suggests that the universe is contracting.

Hubble's brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding.

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What is important in Hubble's discovery about the red shift in the spectra of galaxies? a. It proves the Big Bang theory. b. It suggests the existence of black holes. C. It suggests that the universe is expanding. d. It suggests that the universe is contracting.​

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What is important in Hubble's discovery about the red shift in the spectra of galaxies? a. It proves the Big Bang theory. b. It suggests the existence of black holes. C. It suggests that the universe is expanding. d. It suggests that the universe is contracting.