🌔 A gibbous moon is a phase of the moon that appears more than half but less than fully illuminated. It is characterized by its distinctive shape, resembling a large letter "C" or a backward "D." The term "gibbous" refers to the swollen or bulging appearance of the moon during this phase. As the moon progresses from a crescent to a full moon, it goes through the gibbous phase, providing a captivating sight in the night sky.