Edwin Hubble applied Doppler effect to light and the universe (1 gen 1912 anni – 1 gen 1912 anni)

Descrizione:

Edwin Hubble used the Doppler effect to determine that the universe is expanding. Hubble found that the light from distant galaxies was shifted toward lower frequencies, to the red end of the spectrum. If the galaxies were moving toward Hubble, the light would have been blue-shifted

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