A crescent is 1/4 of a full moon while a Gibbous is 3/4 of a full moon.
The moon is in its gibbous phase when the illuminated area is greater than a semicircle but less than a full circle. This phase is between the first quarter and full moon phases, when more than half of the moon's face is visible from Earth, but it is not yet completely illuminated.
The gibbous phases of the Moon occur when the visible face of the Moon is more than half illuminated, but not fully illuminated.
When less and less of the illuminated half of the moon can be seen each night, it is called the "waning" phase of the moon. Specifically, this occurs after the full moon, leading to phases such as the waning gibbous and waning crescent. During this time, the visible portion of the moon decreases until it reaches the new moon phase.
The moon wanes on the left side. as it transitions from full to new. It appears to be getting smaller as less of its illuminated surface is visible.
A crescent is 1/4 of a full moon while a Gibbous is 3/4 of a full moon.
The moon is in its gibbous phase when the illuminated area is greater than a semicircle but less than a full circle. This phase is between the first quarter and full moon phases, when more than half of the moon's face is visible from Earth, but it is not yet completely illuminated.
At a full moon, 100% of the visible surface of the Moon is illuminated by the Sun. Half of the Moon is always illuminated by the Sun, and half of the Moon is visible from Earth. But they're not usually the same half. At a full moon, they are. This happens when the Sun, Earth and Moon are approximately lined up in the sky. If the alignment is exact, we'll have a lunar eclipse because the Moon will pass through the Earth's shadow, which is the only time that less than half of the Moon is lit up.
The gibbous phases of the Moon occur when the visible face of the Moon is more than half illuminated, but not fully illuminated.
When less and less of the illuminated half of the moon can be seen each night, it is called the "waning" phase of the moon. Specifically, this occurs after the full moon, leading to phases such as the waning gibbous and waning crescent. During this time, the visible portion of the moon decreases until it reaches the new moon phase.
"Gibbous" . . . less than full but more than half illuminated.
A gibbous moon is one of the phases of the Moon, when the size of the illuminated portion is greater than half but not a full Moon.
The moon wanes on the left side. as it transitions from full to new. It appears to be getting smaller as less of its illuminated surface is visible.
These are different phases of the moon based on its appearance as observed from Earth. Crescent moon is when less than half of the moon is visible, first quarter is when half of the moon is visible, waning gibbous is when more than half but less than full moon is visible, and waxing gibbous is the phase when more than half but less than full moon is visible.
before it is full: waxing gibbous after it is full: wanning gibbous
The "gibbous" moon phases occur when the Moon is more than half illuminated, but less than full.
The opposite of a gibbous moon is a crescent moon. A gibbous moon is when the illuminated portion of the moon is greater than half, while a crescent moon is when the illuminated portion is less than half.