On the night of Jan. 31, it doesn’t matter what you’re doing—you owe it to yourself to gaze at the sky.
When you do, you will be treated to both a visible supermoon—what we call a full moon at its closest orbital point to Earth—and a total lunar eclipse. The celestial coincidence hasn’t happened in more than 150 years. That means there were people who lived and died on this Earth without ever having had a chance to see this phenomenon, which won’t reappear again for another decade.
This supermoon also happens to be the final one in a supermoon trilogy—the first two of which appeared on Dec. 3 and Jan. 1. As the second full moon of the month, it earns the title of a blue moon as well.
