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La sonda Parker ce l’ha fatta: dopo il passaggio a 6,1 milioni di chilometri dalla superficie del Sole, è riemersa dal silenzio radio. Nelle scorse ore un segnale acustico ha infatti raggiunto la Terra, indicando che l’apparecchiatura “è in buone condizioni e funziona normalmente”, come reso noto venerdì dall’agenzia spaziale statunitense NASA.
Il sorvolo ravvicinato è avvenuto alle 12.53 (ora svizzera) della Vigilia di Natale alla velocità record di 692’000 chilometri all’ora. Sino ad allora mai un oggetto costruito dall’uomo si trovava così vicino a una stella.
La missione, avviata nel 2018, sta fornendo diversi dati utili allo studio del Sole. Il recente sorvolo ravvicinato mira in particolare a comprendere come mai la corona solare è più calda della superficie, ma anche a tracciare l’origine del vento solare e scoprire come le particelle energetiche provenienti dalla stella vengano accelerate a una velocità prossima a quella della luce.
Solar Probe, lancio riuscito
Telegiornale 12.08.2018, 22:00
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