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law of universal gravitation
States that every object in the universe attracts every other object
gravity
The attractive force between objects that pulls objects down |
inertia
An object to resist a change in motion
axis
An imaginary line that passes through the earths center on which it spins
rotation
The spinning motion of a planet on its axis
revolution
The movement of an object around another object
orbit
The path of an object as it revolves around another object in space
solstice
Two days of the year when the sun reaches its greatest distance north and south
equinox
Two day of the year when neither hemisphere is tilted towards or away from the sun
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