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nurse15 nurse15
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A week ago

To determine the orbital period of a visual binary, what must we measure?



position on the sky



brightness



luminosity



temperature

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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cglotfeltycglotfelty
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A week ago
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nurse15 Author
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Helped a lot
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This helped my grade so much Perfect
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You make an excellent tutor!
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