Beta Cephei variable

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What Wikipedia says

Beta Cephei variables, also known as Beta Canis Majoris stars, are variable stars that exhibit small rapid variations in their brightness due to pulsations of the stars' surfaces, thought due to the unusual properties of iron at temperatures of 200,000 K in their interiors.

Excerpt from the Wikipedia article “Beta Cephei variable”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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