On December 26, 1978, the Moon had a star resting on its...

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Question: On December 26, 1978, the Moon had a star resting on its tip. What was this called and how often does it happen?

Answer: In the morning hours of December 26, 1978, Venus was totally obscured by the Moon, depending upon where you were standing. From some angles, it appeared the planet was resting on the Moon. Such a phenomena is called a “lunar occultation.”