Sky gazers will be treated to a rare convergence of celestial events on 31 January—a blue moon, a supermoon, and a total lunar eclipse, all in one. The phenomenon graces the sky when the second full moon of the month (known as a blue moon) is in its closest position to Earth, making it appear even larger than usual—a supermoon. The seldom-seen event will be visible in western North America, Asia, Australia, and elsewhere across the Eastern Hemisphere, Space.com reports. So, if you’re in one of those lucky locations and want to see an event that’s literally once in a blue moon—here’s your chance.
*Correction, 19 January, 11:02 a.m.: A previous version of this article misstated that a “blue blood moon eclipse” in 1866 also occurred at the same time as a supermoon.