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Which of the following is used to determine if a star is moving closer to Earth?
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Which of the following is used to determine if a star is moving closer to Earth?
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Jul 16, 2018
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Which of the following is used to determine if a star is moving closer to Earth?
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middle-school
Dorla
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This is Doppler Shift
QtRoS
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Jul 22, 2018
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