Eclipses
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Transcript: Eclipses occur due to the coincidence that the sun and the moon have the same apparent angular size in the sky, about half of a degree. Eclipses can only occur when the Earth, the sun, the moon are in the same plane. A lunar eclipse occurs when the Earth passes between the Moon and the Sun, and the Earth casts a shadow on the Moon. Solar eclipses occur when the Moon passes between the Earth and the Sun, and the moon casts a shadow on the Earth.
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