Group 1 - The article highlights the occurrence of the second largest full moon of the year on December 5, providing an opportunity for moon enthusiasts to enjoy the view starting from the evening of December 4 [1][4] - The phenomenon of a "supermoon" occurs when a full moon coincides with the moon's closest approach to Earth, known as perigee, making it appear larger [2][4] - In 2023, there are three supermoons, occurring on October 7, November 5, and December 5, with the November full moon being the largest [4] Group 2 - Observers may find it challenging to notice the size differences between full moons, but those with experience can discern variations through careful observation and comparison [7] - The optimal time for viewing the full moon on December 5 is shortly after sunset on December 4, as the moon will appear round and bright, resembling a delicate silver plate [7]