"The moon's orbit around the Earth isn't a perfect circle, so it gets nearer and farther as it swings around. A so-called supermoon happens when a full moon is closer to Earth in its orbit. That makes the moon look up to 14% bigger and 30% brighter than the faintest moon of the year, according to NASA. November's supermoon is the second of three supermoons this year and also the closest: The moon will come within just under 222,000 miles (357,000 kilometers) of Earth."
"NEW YORK (AP) - The moon will look slightly bigger and brighter Wednesday night during the closest supermoon of the year. The moon's orbit around the Earth isn't a perfect circle, so it gets nearer and farther as it swings around. A so-called supermoon happens when a full moon is closer to Earth in its orbit. That makes the moon look up to 14% bigger and 30% brighter than the faintest moon of the year, according to NASA."
The moon's orbit around Earth is elliptical, causing variable distance and apparent size. A supermoon occurs when a full moon is near Earth, making it appear up to 14% larger and 30% brighter than the faintest full moon of the year. November's supermoon is the second of three this year and will be the closest, approaching just under 222,000 miles (357,000 kilometers). The closer distance can cause slightly higher tides, though the effect is not very noticeable. No special equipment is required to view a supermoon, but size differences can be difficult to discern without image comparisons. Supermoons occur several times yearly.
Read at Boston.com
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