First Supermoon of the Year Is Approaching—Here’s What to Know

First Supermoon of the Year Is Approaching—Here’s What to Know
The full moon rises in the over a beer sign in the outfield at Kauffman Stadium during a baseball game between the Kansas City Royals and the Detroit Tigers in Kansas City, Mo., on Sept. 17, 2024. Charlie Riedel/AP Photo
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NEW YORK—The moon will appear slightly larger and brighter Monday night during what’s known as a supermoon.

October’s supermoon is the first of three this year. It happens when a full moon is closer to Earth in its orbit. That makes the moon look up to 14 percent bigger and 30 percent brighter than the faintest moon of the year, according to NASA. The subtle difference happens a few times a year, sometimes coinciding with other astronomical events such as lunar eclipses.