Tonight, May 30, 2026, the second full moon of May, known as the 'Blue Moon', will rise, marking the smallest full moon of the year. This event can be viewed live online, starting at 9:30 p.m. EDT (0130 GMT May 31), through a free livestream hosted by Gianluca Masi and the Virtual Telescope Project based in Manciano, Italy. The livestream will also feature archival images of the moon over iconic Roman landmarks. The term 'Blue Moon' refers to the second full moon in a calendar month, a phenomenon that occurs approximately every 2.5 years. This particular Blue Moon is unique as it occurs just 19 hours before the moon reaches apogee, making it the most distant full moon of 2026. Consequently, it will appear smaller and dimmer than usual, sometimes referred to as a 'micromoon', which can be up to 14% smaller than a supermoon. Viewers are encouraged to share their moon photos with Space.com.