The sun and its effects on Earth

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revolution

a course or procedure that returns to a starting point.

sun

a star; a big ball of gas and fire

orbit

an elliptical path

tilt

inclined or slanted; not straight

geocentric

the idea that the Earth is at the center of the Universe

heliocentric

the idea that the sun is the center of our solar system

rotation

turning around on an axis


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