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The Andromeda galaxy and our galaxy, the Milky Way, will eventually merge into a single elliptical galaxy. If a star from the Andromeda appears yellow

The Andromeda galaxy and our galaxy, the Milky Way, will eventually merge into a single elliptical galaxy. If a star from the Andromeda appears yellow to an observer on Earth, how does the star appear to an observer orbiting around the star within the Andromeda? (Think Doppler shift from chapter 12)

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