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Sky Science

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Across
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A force that attracts and holds the universe together, which gives objects weight.
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A small body of matter from outer space that enters the earth's atmosphere, which appears as a streak of light.
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A celestial body orbiting the earth or another planet.
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A natural satellite that orbits the Earth.
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A spiral island of stars in space.
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A half of a sphere.
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Bright stars grouped according to the patterns they make in the sky.
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A large ball of dust, ice, rock, and gas that orbits the sun.
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To send or give out.
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All existing matter and space considered as a whole.
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The action of rotating around an axis or center.
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Chunks of rock that orbit the Sun between the orbits of Mars and Jupiter.
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A device that uses shadow to tell time.
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The time or date at which the sun crosses the celestial equator, when day and night are equal length.
Down
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The surface look or feel of something.
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An imaginary line about which a body rotates.
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A layer of air between the Earth and outer space.
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Time for Earth to make a complete rotation on its axis.
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The study of the Universe and all of the bodies that appear in the skies.
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The motion of a planet along its orbit around the sun.
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The apparent height of a celestial object above the horizon, measured as an angle.
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A phase in the moon`s cycle where the moon is more than half full, but not entirely.
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The path of a planet or other heavenly body as it revolves around another body in space.
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The period of 365 days.
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A curved shape of a waxing or waning moon.