To be considered a supermoon the location, timing, and phase of the moon must all come together at certain points. First, the moon must be in either a visible and illuminated full moon phase, or a dark and entirely invisible new moon phase. Next, the moon’s orbit has to bring it around to the one point where it comes the closest to the Earth. Finally, these two factors must occur at the same time and coincide with one another in order for the moon to be called a supermoon.
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