Il cielo di Marte è colorato da aurore spettacolari, a predominanza azzurra e molto luminose. Un fenomeno che i dati raccolti dalla sonda europea Mars Express ora confermano.
L'ipotetico esploratore che si trovasse a passeggiare vicino al Polo Sud di quel pianeta vedrebbe il firmamento, alzando gli occhi al momento giusto, colorarsi di celeste, rosso e verde.
A provocare l'evento è l'impatto delle particelle cariche provenienti dal Sole con le "anomalie magnetiche crostali", concentrate, appunto, nell'emisfero meridionale, frammenti del campo magnetico esistente 3,5 milioni di anni fa.
ANSA/dg
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