waning phases
When the illuminated portion is decreasing from one night to the next, the moon is in its 'waning' phases.
Waning gibbous
The general term for the visible lit part of the moon is "the phase of the moon." The visible lit portion can have a crescent shape, a gibbous shape or a "half-moon" (half circle) shape.
Getting larger is WAXING. Getting smaller is WANING..
Only during a lunar eclipse, which can only happen during a full moon. The visible phases of the moon are caused by it changing its position relative to Earth and the sun. The visible portion is the moon's day side; the side facing toward the sun. The unlit portion is the night side, facing away from the sun.
crescent
When the illuminated portion is decreasing from one night to the next, the moon is in its 'waning' phases.
New Moon = the moment when none of the moon's illuminated half is visible from the earth.Waxing Crescent = about 7 days; visible portion growing from zero to half of the moon's diskFirst quarter = the moment when half of the moon's disk is visibleWaxing gibbous = about 7 days; visible portion growing from half to all of the moon's diskFull Moon = the moment when all of the moon;s illuminated half is visible from the earth.Waning gibbous = about 7 days; visible portion shrinking from all to half of the moon's diskLast quarter = the moment when half of the moon's disk is visibleWaning Crescent = about 7 days; visible portion shrinking from half of the moon's disk to zero
A waning cresent.
A decrease in the illuminated portion of the Moon is called waning. When the illuminated portion is increasing, it is called waxing.
A waning cresent.
Waning gibbous
Typically, the Dark Side of the Moon
The general term for the visible lit part of the moon is "the phase of the moon." The visible lit portion can have a crescent shape, a gibbous shape or a "half-moon" (half circle) shape.
During the two-weeks' period when the illuminated portion of the moon is increasing from night to night as seen from the earth, we say that the moon is in its "waxing" phases.
There are 8 "named" phases of the Moon, representing the portion of its sunlit surface that is visible from Earth. (Whether the progression is from right to left, or left to right, depends on whether you are north or south of the Equator) New moon (Not visible or very barely visible) Waxing Crescent moon (1-49% visible) First Quarter moon (50% visible) Waxing gibbous moon (51-99% visible) Full Moon (Fully visible) Waning gibbous Moon (51-99% visible, opposite side of face from Waxing) Last Quarter Moon (50% visible, opposite half from that visible on First Quarter) Waning Crescent Moon (1-49% visible)
Getting larger is WAXING. Getting smaller is WANING..