tech
A rare blue micromoon arrives this weekend and won't be back until December 2028. Here's what to expect.
Updated on: May 28, 2026 / 10:24 AM EDT / CBS/AP
TL;DR
- A blue micromoon occurs when there are two full moons in one month, with the second being the most distant and smallest-looking of the year.
- This celestial event happens roughly every two to three years, with the next one not expected until December 31, 2028.
- The moon will appear about 6% smaller and 10% dimmer than an average full moon, with subtle differences noticeable only to keen observers.
- In the Northern Hemisphere, the blue micromoon will be seen alongside Antares, a bright star in the constellation Scorpius.
- Skywatchers south of the equator and across the Pacific may witness the moon obscuring Antares.
- The Virtual Telescope Project will stream live images of the blue micromoon.