Cambiare le batterie normalmente è un'operazione facile. Diventa più complicata se si deve fare in orbita e riguarda la Stazione spaziale internazionale (ISS), il cui sistema elettrico ha bisogno di un aggiornamento.
Due astronauti, nel giorno dell'Epifania, hanno quindi indossato la loro tuta spaziale e si sono messi al lavoro per installare gli adattatori di sei nuove batterie, che dovrebbero restare in funzione fino alla fine della missione dell'ISS, prevista nel 2024. Si tratta della passeggiata spaziale numero 196 per la costruzione e il mantenimento della stazione spaziale.
AFP/sf
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