All'alba di lunedì varrà la pena guardare all'insù per non perdersi l'eclissi totale di Luna, lo spettacolo astronomico dell'anno. Il fenomeno, grazie alla meteo favorevole sarà in particolare visibile sulle Alpi e nel sud del paese, riferisce Meteonews.
L'evento sarà osservabile fra le 4.30 e le 08.00 circa con l'intensità massima poco dopo le 6.00. Occorre guardare verso ovest, cercando di evitare di essere vicini a fonti di luce, e lo spettacolo non mancherà: la Luna si tingerà infatti di rosso.
L'eclissi totale di Luna si verifica quando il Sole, la Terra e la Luna sono allineati e quindi la Terra, nascondendo la luce del Sole alla Luna, proietta su di essa un cono di penombra e un cono d'ombra. Quando la Luna si trova interamente all'interno del cono d'ombra, inizia la fase di eclisse totale: il disco lunare ha una luminosità molto più bassa e la frazione di luce solare che filtra attraverso l'atmosfera terrestre dà alla Luna una colorazione bruno-rossastra.
Per rivedere un'eclissi simile occorrerà aspettare quasi 10 anni, il 31 dicembre 2028.
ATS/M. Ang.
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