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Question

The method of measuring distance to stars beyond 100 light-years is

A
Capheid variable stars
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B
Heid variable stars
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C
Lowheid variable stars
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D
None
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Solution

The correct option is A Capheid variable stars
The brightness of the stars changes over time. The difference in the brightness over time allows calculating the distance to the star. This is the cepheid variable stars method that is used to measure the distance to stars beyond 100 light years.
The method of measuring the distance to stars beyond 100 light-years is Cepheid variable stars

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