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The doppler effect indicates that the universe is expanding because_________. which phrase best completes the sentence.

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ellielikesjazz

Answer:  light from other galaxies is red.

Explanation: Astronomers have observed that light from the distant object in the universe is shifted towards the frequency of red color which indicates that those object are receding or moving away from the planet earth.This phenomena was termed as Red shift .Same thing goes for galaxies which are very far away from the planet earth.

Where as if galaxies were moving towards the the planet earth their light would have shifted toward the frequency of blue color termed as blue shift.

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