Multiple Choice
The proper motion of a star or other object is measured by
A) measuring the intensity of the light in different regions of the blackbody curve.
B) observing the Doppler shift of spectral lines in the light from the object.
C) measuring the change in the angular diameter of the object.
D) watching the object move compared to the background stars.
Correct Answer:
Verified
Correct Answer:
Verified
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