Every 27 years, a bright star called Epsilon Aurigae 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。
Scientists taking close-up photographs of the Epsilon Aurigae during its eclipse, which happens every 27 years, noticed the strange dark object's shadow on the star.
御夫座ε星每27年就会发生一次蚀变，科学家们趁此良机拍下了它的特写照片，通过照片他们发现有一片奇怪的黑色物体投影在该星体上。
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