Geography
Geography, 02.12.2021 02:30, miarobless12389

Careful measurements reveal that a star maintains a steady apparent brightness at most times, except that at precise intervals of 73 hours the star becomes dimmer for about 2 hours. The change in brightness alternates between a small change and a large change. The most likely explanation is that:.

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Careful measurements reveal that a star maintains a steady apparent brightness at most times, except...

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