the path in which the earth orbits the sun
sun is directly over the tropic of cancer, 1st day of summer
sun is directly overhead at the tropic of capricorn, 1st day of winter
sun is directly overhead at the equator, 1st day of fall
sun is directly overhead at the equator, 1st day of spring
when the rotation and revolution are the same
the moon blocks the sun from the earth
the earth's shadow falls on the moon
closest point in the moon's orbit around earth
furthest point in the moon's orbit around earth
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