American Association of Variable Star Observers.

美国变星观测者协会。

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Another type of standard candle is a type of star called a Cepheid variable.

另一种标准烛光是一种叫做造父变星的恒星。

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Another type of standard candle is a type of star called a Cepheid variable.

另一种标准烛光是一种叫做造父变星的恒星。

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