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| the changing shapes of the moon(new moon,waxing cresant,first quarter,waxing gibbous,full moon,waning gibbous,last quarter,& waning cresent |
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| the casting of a shadow by one object in space on another object in space |
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| an eclipse that completly blocks our view of an object in space such as the moon or the sun |
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| an eclipse that partly blocks our view of an object in space such as the moon or the sun |
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| a point in earth's orbit when the northern hemisphere is tilted 23.5 degrees toward the sun; the first day of summer in the northern hemisphere |
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| Spring, Summer, Fall, or Winter |
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| The point in Earth's orbit when Earth's North Pole is tilted a full 23.5 degrees away from the sun; the first day of winter in the northern hemisphere. |
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| The first day of spring in the northern hemisphere. At this point in space, Earth is not tilted toward or away from the sun. Sunlight strikes places the same distance north and south of the equator. |
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| The first day of autumn in the northern hemisphere. At this point in space, Earth is not tilted toward or away from the sun. Sunlight strikes places the same distance north and south of the equator. |
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