Is it a ‘perigee-syzygy’ or a ‘supermoon’?
My husband was so delighted with the new-found term perigee-syzygy that he kept repeating it, until the syllables merged into his regular breathing and he fell asleep in his chair. The compound word means what the vulgar press call a supermoon. A syzygy is the lining-up of the moon, Earth and sun, producing a full moon (or a new moon, which is invisible because only the far side is illuminated). The perigee is when the moon is nearest the Earth (its furthest being the apogee). The distance varies because the moon orbits the Earth in an ellipse. The funny-looking word syzygy, used in English since the 17th century, merely comes from the Greek for a yoke and is thus related to the grammatical term zeugma (‘straight home, in a flood of tears and a sedan-chair’ – The Pickwick Papers).