spaceplasma: Cepheid Variables are very luminous stars, 500 to 300,000 times greater than the Sun, with short periods of change that range from 1 to 100 days. They are pulsating variables that expand and shrink dramatically within a short period of

spaceplasma: Cepheid Variables are very luminous stars, 500 to 300,000 times greater than the Sun, with short periods of change that range from 1 to 100 days. They are pulsating variables that expand and shrink dramatically within a short period of

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