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A supermoon is the coincidence of a full moon or a new moon with the closest approach the Moon makes to the Earth on its elliptical orbit, resulting in the largest apparent size of the lunar disk as seen from Earth. The technical name is the perigee-syzygy of the Earth-Moon-Sun system. The term "supermoon" is not astronomical, but originated in modern astrology. The association of the Moon with both oceanic and crustal tides has led to claims that the supermoon phenomenon may be associated with increased risk of events such as earthquakes and volcanic eruptions, but the evidence of such a link is widely held to be unconvincing. The opposite phenomenon, an apogee-syzygy, has been called a micromoon,〔(What is a micromoon? ) Timeanddate.com, accessed 1 Oct 2015.〕 though this term is not as widespread as supermoon. Occasionally, a supermoon coincides with a total lunar eclipse. The most recent occurrence of this was on September 27–28, 2015, while the next time will be in 2033. ==Distance== The Moon's distance varies each month between approximately and due to its elliptical orbit around the Earth (distances given are centre-to-centre). A full moon at perigee is visually larger up to 14% in diameter (or about 30% in area) and shines 30% more light than one at its farthest point, or apogee. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「supermoon」の詳細全文を読む スポンサード リンク
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