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The two days of the year on which the sun reaches its greatest distance north or south of the equator.
An imaginary line that passes through earth's center and the north and south poles, about which earth rotates.
The attractive force between objects its strength depends on their masses and the distance between them.
Law of universal gravitation
The scientific law that states that every object in the universe attracts every other object.
Newton's first law of motion
The scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
The blocking of sunlight of earth that occurs when the moon is directly between the sun and earth.
The blocking of sunlight to the moon that occurs when the earth is directly between the sun and the moon.
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