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Moon Phases

Vocabulary concerning phases of the moon
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Moon phase
the shape of the bright part of the Moon
new Moon
occurs when the Moon is positioned between Earth and the Sun. The new Moon is invisible
full Moon
occurs when Earth is positioned between the Sun and the Moon. The entire face of the Moon is lit.
first-quarter Moon
occurs when the Moon is halfway between new-Moon position and full-Moon position. The right half of the Moon face is lit.
third-quarter Moon
occurs when the Moon is halfway between full-Moon position and new-Moon position. The left half of the Moon face is lit.
crescent Moon
any phase of the Moon that has less than half of its face illuminated (lit up)
gibbous Moon
any phase of the Moon that has more than half of its face illuminated (lit up)
waxing
when the face of the Moon looks larger each day.
waning
when the face of the Moon looks smaller each day

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