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Astronomy Cepheid stars appear to pulsate because they expand and contract in size. In its contracted phase, the Cepheid star Zeta Geminorum is 51 million miles across. This is 5 million miles less than the star’s distance across in its expanded phase. Find the distance across Zeta Geminorum in its expanded phase.

Short Answer

Expert verified

The distance across Zeta Geminorum in its expanded phase is56million miles.

Step by step solution

01

Step-1-Writing formula from given information

Letxbe Size of Zeta Geminorum in expanded phase.

From the given information, we can say that,

Size of Zeta Geminorum in expanded phase= Size in Zeta Geminorum contracted phase +Size less than the star’s distance across in it expand phase.

02

Step-2-Solving for value of x

On substituting values, we get,

x=51+5x=56
03

Step-3- Conclusion 

Therefore, the size of Zeta Geminorum in expanded phase=x=56million miles.

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