Regular observation of the moon  makes it clear. It is elusive. Alluring  but elusive. To the human eye, it is constantly moving and this makes the study of it  a challenge. At the same time it  has patterns that have  an amount of predictability to them The apparent span that the moon makes changes from night to night. A full moon in January elevates very high in the sky. One might say overhead. By contrast,  a full moon in   seems to only get slightly above the horizon

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