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星食

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In this July 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation.

掩蔽（Occultation）とは？天文学における遮蔽現象の仕組みと科学的価値

掩蔽天文学月掩蔽小惑星
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