On May 31, 2026, skywatchers in Guangzhou and around the world will have the opportunity to observe a blue moon, which is also the smallest full moon of the year. This event occurs when the moon is at its apogee, the farthest point from Earth in its elliptical orbit, making it appear slightly smaller than usual.
A blue moon is defined as the second full moon in a calendar month, a phenomenon that happens approximately once every 2.5 years. The moon will not actually appear blue in color; the term is a traditional name for this lunar occurrence.
Residents of Guangzhou can view the blue moon with the naked eye, but using binoculars or a telescope may enhance the experience. The best viewing time is after sunset, when the moon rises in the east.
