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Q.

Choose the correct option in the method of measuring the distance to stars beyond 100 light-years.


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a

Cepheid variable stars

b

Heid variable stars

c

Lowheid variable stars

d

None 

answer is A.

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Detailed Solution

        Interesting fact is that the brightness of the stars changes over time.
        Difference in the brightness over the time allows calculating the distance to the stars.
        This method is called the cepheid variable stars method.
        It is used to measure the distance to stars beyond 100 light years.
  
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