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Sky Science

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