Spectacular Celestial Events in September: Total Lunar Eclipse, Saturn at Opposition, and Star Clusters with the Moon
September’s night sky is packed with highlights! The most anticipated event—a total lunar eclipse—will occur in the early hours of September 8 (Monday), accompanied by Saturn at opposition, Venus near the Beehive Cluster, and the Moon passing close to the Pleiades. Together, these phenomena will make September’s summer night skies particularly lively and spectacular. The month’s centerpiece, the total lunar eclipse, takes place from 00:27 to 03:56 on September 8, lasting 3 hours and 29 minutes in total. During the hour-long total phase, the Moon will take on an eerie dark-red hue. This is the first fully visible total lunar eclipse since 2018, and the entire event can be enjoyed with the naked eye from any open location with a clear view to the southwest. On September 1 (Monday) around 3 a.m., Venus will rise in the northeast alongside the Beehive Cluster (M44), with the two separated by only about 1 degree. At magnitude –3.9, Venus will shine brilliantly next to the cluster’s dozens of faint stars—a perfect pairing to observe through binoculars.On September 13 (Saturday), from midnight until dawn, the last-quarter Moon will pass near the Pleiades (M45), also known as the Seven Sisters and often called the ‘celestial jewel of the night sky.’On September 21 (Sunday), Saturn reaches opposition, its closest approach to Earth this year, offering the best opportunity to admire the planet often called the most beautiful in the Solar System. On that night, Saturn’s rings will be tilted by only 1.8°, appearing through a telescope almost like a fine thread slicing across Saturn. The rings’ tilt remains minimal throughout the year, shrinking to just 0.4° on November 24, when the rings will nearly vanish from view.For more details on these and other September sky events, please visit the Taipei Astronomical Museum website.