what is waxing gibbous moon
Waning Gibbous Moon and The Moon Phases. Waning Gibbous Moon. The waning gibbous moon happens when the moon is between a 90 and 135 degree angle with respect to the Earth and Sun. So we are seeing more than half of the moon illuminated and less than half in shadow. The word gibbous refers to phases where the moon is more than half illuminated.