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Scatta il conto alla rovescia per il gran finale della sonda Cassini, previsto domani, venerdì, con il tuffo nell'atmosfera di Saturno. L'inizio della discesa nell'atmosfera del pianeta degli anelli è previsto alle 13.54 (ora svizzera) quando la sonda, nata dalla collaborazione fra NASA, Agenzia spaziale europea (ESA) e Agenzia spaziale italiana (ASI), si troverà a circa 1'915 chilometri dallo strato superiore delle nubi del pianeta.
Durante la picchiata a 113'000 chilometri orari, la sonda accenderà tutti i propulsori in modo da stabilizzarsi e
puntare l'antenna verso la Terra, trasmettendo gli ultimi, preziosissimi dati, a una distanza di 400 milioni di chilometri dal nostro pianeta.
La perdita del segnale è prevista dopo un minuto dall'inizio della discesa, mentre entro circa 30 secondi, il veicolo dovrebbe cominciare a bruciare come una meteora, per poi disintegrarsi completamente in pochissimo tempo.
ANSA/eb
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