Cepheid to vary in apparent brightness

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Reference no: EM13519258

Click on the blue "Cepheid" label, then click the label on the bottom of the Interactive Figure that reads "Cepheids as Standard Candles" to bring up the next screen. Read the instructions that appear in the upper left hand corner and study the animation. What actually causes a Cepheid to vary in apparent brightness?

Reference no: EM13519258

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