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New moon
Full Moon
Waxing Crescent
1st Quarter
3rd Quarter
Waning Gibbous
Waning Crescent
Waxing Crescent
The MoonThe Moon• A moon phase cycle
(LUNAR CYCLE) lasts 29 1/2 days
• Moon phases are caused by the positions of the Moon, Sun, and Earth
• The moon also sees Earth phases
DAY 1
The Moon's un-illuminated (not lit
by the Sun) side is facing the Earth. The Moon is not
visible.
New MoonNew Moon
DAY 3
The Moon seems to be getting bigger – more of the lit side is showing.
WAXING CRESCENT
Getting bigger:
WAXING
The RIGHT ½ of the
moon is lit
Less than ½ the moon showing:
CRESCENT
FIRST QUARTERFIRST QUARTERDAY 7
One-half of the Moon is illuminated by direct sunlight.
One half of one half
of the moon is visible.
Waxing Gibbous
DAY 11
The Moon is more than one-half but not fully illuminated by direct sunlight.
GIBBOUS: more
than half of the
moon is visible.
Full Moon Full Moon
DAY 14
The Moon's illuminated side is facing the Earth. The Moon is completely
illuminated by direct sunlight.
Waning Gibbous
DAY 17
The Moon is more than one-half but not fully illuminated by direct sunlight.
Waning: getting smaller.
Moon is lit on the
LEFT side
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