Every 27 years, a bright star called EpsilonAurigae fades over period of two years, then brightens.
每隔27年,一个被称为牧夫座ep silon的明亮恒星都会进入为期2年的暗淡时期,然后再度变亮。
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Scientists taking close-up photographs of the EpsilonAurigae during its eclipse, which happens every 27 years, noticed the strange dark object's shadow on the star.