Dopo 70 anni, lunedì 14 potremo ammirare l’illusione lunare, grazie alla quale il nostro satellite naturale apparirà più grande nella misura del 14%. In questa illusione ottica – la cui spiegazione è ancora dibattuta – la Luna appare più grande quando è vicina all'orizzonte rispetto a quando è alta nel cielo.
La Luna raggiungerà il perigeo, il punto più vicino alla Terra, alle 11.22 GMT (12.22 ora svizzera) e sarà piena alle 13.52 GMT. Giunta la notte, sarà visibile ovunque nel mondo.
La NASA dichiara che la luna apparirà il 30% più luminosa. Il fenomeno dell’illusione lunare sarà particolarmente accentuato lunedì, perché la distanza dalla Terra sarà di soli 356'509 Km, circostanza che, la prossima volta, si verificherà il 25 novembre 2034.
Una delle teorie più diffuse che cerca di spiegare la causa di questa illusione è la considerazione del fatto che l'osservatore, quando è allo zenit, non è in grado di percepire la distanza della Luna, sola nel cielo e senza riferimenti.
ATS/Dek
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