The Motion That Is Used to Change the Position of the Observer

question 16

Multiple Choice

The motion that is used to change the position of the observer in the most common parallax measurements of distances to relatively nearby stars is the

• A) motion of the Sun around the galactic center.
• B) change in latitude of the observation point on Earth.
• C) motion of Earth in its orbit around the Sun.
• D) rotation of Earth on its axis.

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