Overview
- The event, expected across the UK on Sunday, May 31, is the extra 13th full moon of the year known as a blue moon.
- It coincides with a micro moon, which happens when the Moon is farthest from Earth at about 250,000 miles, so its disk looks smaller and its light a bit fainter.
- Despite the name, the Moon will not look blue to most people, with rare haze or dust sometimes giving it a tint.
- Best views come shortly after sunset from dark-sky sites or any spot with a clear horizon, and binoculars or a zoom lens can reveal more detail.
- The last blue moon rose in August 2024 according to Royal Greenwich Museums, with the next expected on May 20, 2027 and December 31, 2028.