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axis
- a real or imaginary line that a spinning object turns around
- (ex. Earth's north and south pole)
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waning
when the part of the Moon you see gets smaller (slowly goes away)
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simulate
to show or compare one thing to another
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rotate
to spin in place (ex. earth takes 24 hours to cause day and night)
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ellipse
a flattend circle shape (ex. the orbit of Earth)
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crater
a hollow area, or pit, in the ground
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orbit
the path a revolving object moves along
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revolve
the move in a circular or nearly circular path
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phases
different shapes of the Moon
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waxing
when the part of the Moon you see grows larger (gets shinier like when you wax a car)
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star
a hot, glowing sphere of gases that gives off energy
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asteroid belt
an area between the inner and outer planets
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solar system
made up of the sun, 8 planets, moons, and other objects in space
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satellite
an object that moves in orbit around another, larger object
(God-made = moons Man-made = metal ones)
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asteroid
chunks of rock or metal that orbit the sun
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constellation
a pattern or picture outlined by stars; used by farmers for planting and sailors for direction
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comet
mostly chunks of ice mixed with bits of rock and dust; tails are formed as the sun melts part of it (ex. Halley's)
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meteor
small pieces of ice, rock or metal that have broken off colliding comets or asteroids
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meteorite
a meteor that gets through Earth's atmosphere
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planet
sphere shaped satellites of the sun; they cannot make their own light
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