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Why does the Moon keep changing its shape ?
Phases of the moon as seen in the Northern Hemisphere
The images below show the different phases of the moon in one Lunar month.
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Waning crescent Day 25 |
(Half Moon) Day 21 |
Waning gibbous Day 17 |
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Day 0 
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Day 14  |
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Day 3 Waxing crescent |
Day 7 First quarter |
Day 10 Waxing gibbous |
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You are looking at the Moon as though you are looking up from the Earth. |
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When the bright part is getting bigger, the Moon is waxing.
When it is getting smaller, the Moon is waning.
When the Moon is more than half-lit, it is called a gibbous Moon.
When the moon is less than half-lit, it is called a crescent Moon.
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