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10 terms

Sun, Earth, Moon System

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