Mercury Goes Through A Full Cycle Of Phases

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Mercury Goes Through A Full Cycle Of Phases

ons from Part A. This time, classify each observation according to whether it is consistent with only the Earth-centered model, only the Sun-centered model, both models, or neither model. (Note that an observation is "consistent" with a model if that model offers a simple explanation for the observation.) [Earth-centered only] - a planet beyond Saturn rises in west, sets in east [Sun-centered only] - Mercury goes through a full cycle of phases - positions of nearby stars shift slightly back and forth each year [Both models] - stars circle daily around north or south celestial pole - moon rises in east, sets in west each day - a distant galaxy rises in east, sets in west each day [Neither model] - we sometimes see a crescent Jupiter
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Now continue to the follow-up questions to check that you understand why the observations fall into these categories.

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