If you look up this evening, there’s a good chance you’ll see September’s full Harvest Moon rise into the dark sky, just two days before the fall equinox.Β 

To catch the moon at peak fullness, gaze upward after sunset at 7:55 p.m. EDT (11:55 p.m. GMT) on Monday (Sept. 20). If you miss that moment, don’t worry; the moon will appear full until Wednesday morning (Sept. 22), the day of the autumn equinox in the Northern Hemisphere and the spring equinox in the Southern Hemisphere.

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