A supermoon, which is happening Wednesday for a second time this month, occurs when the moon's orbit is closest to Earth at the same time that it's full. That makes it appear slightly bigger and brighter in the sky.
A supermoon, which is happening Wednesday for a second time this month, occurs when the moon's orbit is closest to Earth at the same time that it's full. That makes it appear slightly bigger and brighter in the sky.


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