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优质回答The term "supermoon" refers to a full moon that coincides with the moon's closest approach to Earth in its orbit, known as perigee. This close proximity makes the moon appear larger and brighter in the sky than usual.Supermoons occur because the moon's orbit around Earth is not a perfect circle, but rather an elliptical shape. This means that the distance between the moon and Earth varies throughout the month. When the moon is at perigee, it is about 30,000 miles closer to Earth than when it is at its farthest point, known as apogee.The term "supermoon" was popularized by astrologer Richard Nolle in 1979 and has since gained widespread use. While the scientific term for a supermoon is perigee-syzygy, the term "supermoon" is more commonly used in popular culture.Supermoons can appear up to 14% larger and 30% brighter than a regular full moon. However, the difference is often difficult to notice with the naked eye, especially if you are not comparing it directly to a regular full moon.Supermoons can occur multiple times in a year, but they are not a rare phenomenon. On average, there are about three to four supermoons per year. The exact number can vary depending on the moon's orbit and other factors.Supermoons have captured the public's attention in recent years, with many people enjoying the opportunity to see a larger and brighter moon in the sky. However, from a scientific perspective, supermoons are not particularly significant events. They are mainly a visual spectacle that can be enjoyed by anyone with an interest in astronomy.
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