does “heliocentric” means: referred to the theory that the Sun is the center of the Solar System?, true, false, does “tilted” means: Is an oval formed shape?, true, false , Does “revolution” means: rapid turning about on an axis or central point?, true , false, Does theories can make big changes at what we know?, true , false, does “ellipsis” means Is an oval formed shape?, true , false.

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