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Earth, Moon, and Sun Review

Across
A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit.
The spinning motion of a planet on its axis.
The tendency of an object to resist a change in motion.
A pattern or grouping of stars that people imagine to represent a figure or object.
The scientific law that states that every object in the universe attracts every other object.
An object the orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.
The amount of matter in an object.
An object that orbits a planet.
Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun.
Down
Either of the two days of the year on which the sun reaches its greatest distance north or south of the equator.
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
The movement of an object around another object.
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.
A push or pull exerted on an object.
A measure of the force of gravity on an object.
The attractive force between objects; the force that moves objects downhill.
An imaginary line that passes through a planet's center and its north and south poles, about which the planet rotates.
A system of organizing time that defines the beginning, length, and divisions of a year.
The path of an object as it revolves around another object in space.
A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.