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Today, 01:31

How do scientists know that the universe is expanding?

The Doppler effect shows stars with yellow shifted light

The Doppler effect shows stars with green shifted light

The Doppler effect shows stars with red shifted light

The Doppler effect shows stars with blue shifted light

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Answers (2)
  1. Today, 01:34
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    Answer:C. The Doppler effect shows stars with red shifted light.

    Explanation: Evidence

    Astronomers have discovered that, in general, the further away a galaxy is, the more red-shifted its light is. This means that the further away the galaxies are, the faster they are moving and expanding.
  2. Today, 01:55
    0
    Answer: C: The Doppler Effect shows stars with red shifted light
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