Lucky sky-watchers are about to get a cosmic three-for-one deal, as the second super-size full moon in a month undergoes a dramatic total lunar eclipse on January 31. According to eclipse experts, the event marks the first time anyone on Earth has seen this celestial trifecta in 35 years—and the first time it’s been seen in the Americas in 150 years.
On the 31st, the moon will officially reach its full phase at 8:27 a.m. ET (13:27 UT). This is the second full moon to occur in a calendar month, an event commonly referred to as a blue moon. Around the same time, the full moon will be making an especially close approach to Earth, a phenomenon popularly called a supermoon.
Adding to the space oddity, viewers in some parts of the world will also see a total lunar eclipse on the 31st. When the eclipse hits its peak, the moon’s face can sometimes take on a reddish tone, earning it the moniker of blood moon.