星空有约|12月16日将迎本年度最小残月

Group 1 - The smallest waning crescent moon of the year will occur on December 16, appearing as a thin silver hook in the sky [1] - The second largest full moon of the year, known as the "supermoon," was observed on December 5, and the largest gibbous moon will appear on December 31, showcasing significant changes in the moon's phases within a month [4][10] - The waning crescent moon marks the end of a lunar cycle, while the gibbous moon occurs between the first quarter and full moon phases, indicating a brightening moon surface that is not yet fully illuminated [7] Group 2 - The visibility of the waning crescent moon on December 16 will be in the eastern sky before sunrise, appearing as a 'C' shape, while the gibbous moon will rise in the eastern sky a few hours before sunset, resembling a 'D' shape [10] - The rapid changes in the moon's size within 30 days are due to the overlapping of lunar phases and the moon's orbital patterns, with the average interval between the waning crescent and gibbous moon being approximately 15 days [13]