Which Statement About Stellar Motion Is Incorrect?

(Correct Answer Below)

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Which Statement About Stellar Motion Is Incorrect?

ect? A) Radial velocity is measured by the Doppler shifts of the spectral lines. B) Proper motion is measured in intervals of six months. C) You must also know the parallax to get the transverse velocity. D) The closer stars usually show larger proper motions. E) The space velocity can be found from the radial and transverse velocities.
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B) Proper motion is measured in intervals of six months.

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