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astronomy vocabulary

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
The average distance between the Earth and the Sun   Astronomical Unit  
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The small,dense, rocky planets of the inner solar system   Terrestrial planets  
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The counter-clockwise spin of a planet or moon as seen from above the planet's north pole   Prograde rotation  
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the clockwise spin of a planet or moon as seen from above the planet's north pole   Retrograde rotation  
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The large,gaseous planets of the outer solar system   Gas giants  
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A natural or artificial body that rovolves around a planet   Satellite  
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An event in which the shadow of one celestial body falls on another   Eclipse  
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A small body of ice, rock, and cosmic dust loosely packed together that gives off gas and dust in the form of a tail as it passes close to the sun   Comet  
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A small, rocky body that revolves around the sun   Asteroid  
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The region of the solar system most asteroids occupy; roughly between the orbits of Mars and Jupiter   Asteroid Belt  
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A very small, rocky body that revolves around the sun   Meteoroid  
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A meteoroid that reaches the Earth's surface without burning up completely   Meteorite  
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A streak of light caused when a meteoroid or comet dust burns up in the Earth's atmosphere   Meteor  
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