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1
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the part of the moon phases where the illumination is decreasing; left side of the moon is lit
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3
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the appearance of the illuminated portion of the moon as seen by an observer on Earth
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4
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more than half but less then fully illuminated
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6
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the phase of the moon in which the right half is lit, and the left half is dark
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7
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the path of a celestial body or artificial satellite as it revolves round another body
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12
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the part of the moon phases where the illumination is increasing; right side of the moon is lit
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13
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the attraction that objects have for each other because they have mass and occupy space
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15
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the motion of an object around its own axis
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18
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the time at which the tide reaches its lowest level
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19
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the phase of the moon that occurs when it passes between Earth and the sun
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