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25 March, 21:46

What features signifies to astronomers that a distant star is part of a planetary system

A) the star periodically dims

B) the star expands into a red giant

C) the star moves through the sky

D) the star continuously gets brighter

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Answers (1)
  1. 25 March, 21:52
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    I believe the answer is A bit I'm not 100% sure
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