Si è aperta la caccia alle meduse cosmiche, galassie dalle quali partono lunghissimi "tentacoli" fatti di stelle e gas.
Studiarle aiuterà a capire meglio come questi sistemi evolvono e invecchiano. La spia di questo processo, ancora misterioso, è il modo in cui tali ammassi perdono i loro vapori. Il fenomeno sarà osservato per la prima volta nel dettaglio da uno dei telescopi più grandi e potenti, quello piazzato sulle Ande cilene.
Il progetto, che vede in campo anche astronomi svizzeri, prevede un impegno distribuito sull'arco di due anni.
ANSA/dg
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