- (astrology) a full moon or new moon, when the Earth-Moon distance is in the lowest tenth of its range
Some claim this is not a syzygy unless a solar eclipse or lunar eclipse also occurs, but most references disagree.
- super- + moon
Coined by astrologer Richard Noelle in 1979SuperMoon is a word I coined in a 1979 article for Dell Publishing Company's HOROSCOPE magazine, describing a new or full moon which occurs with the Moon at or near (within 90% of) its closest approach to Earth in a given orbit (perigee). In short, Earth, Moon and Sun are all in a line, with Moon in its nearest approach to Earth.— Richard Noelle