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Two galaxies on opposite ends of the universe are moving away from the Earth. Each has a velocity of 200,000 km/s relative to the Earth. How fast would an observer in one of those galaxies see the other galaxy moving away?

between 300,000 and 400,000 km/s

200,000 km/s

400,000 km/s

between 200,000 and 300,000 km/s

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  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

2 answers

  1. It was D.

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    2. 👎
    3. ℹ️
    4. 🚩
  2. C
    since the speeds are low relative to the speed of light.

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    2. 👎
    3. ℹ️
    4. 🚩

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