摘 要: | Young star far awayin the galaxy(银河)is winking in aregular pattern thatastronomers say is unlikeanything seen before.Ifscience learns to readthose signals,they maydeliver a message aboutthe early stages ofplanetformadon. Sometimes the starshines in full brightness.Other times it fades(退色)to a tiny fraction offull luminosity(发光度),
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