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Periodically you will hear that we are having a "supermoon". Will it be noticeably bigger or brighter than usual?

Answer:

Yes, the "Super Moon" looks bigger and brighter than usual, but not nearly what most of the coverage portrayed. Every month the moon has an apogee (when it is farther from Earth) and a perigee (when it is nearer the Earth.) Every month, there is about about a 15% difference in the apparent size and about a 30% difference in the apparent brightness of the moon. If the full moon happens when the Moon is at perigee, its closest point, the moon looks a tiny bit larger and brighter. The moon on the left is the size of a "Super Moon" compared to a regular full moon on the right.

moon compare