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An astronomer would most likely use parallax to see the Doppler shift in a star. measure the distance to a star. measure the temperature of a star. see the emission spectrum of a star
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An astronomer would most likely use parallax to

see the Doppler shift in a star.

measure the distance to a star.

measure the temperature of a star.

see the emission spectrum of a star

User Artgon
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it’s b, I got it right :)

User Reimundo Heluani
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The correct answer is measure the distance to a star.

It is the semi-angle of inclination between two sight-lines to the star, as observed when the Earth is on opposite sides of the Sun in its orbit. This is used to measure the distance to closer stars.
User Sweetkorn
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