'Aside from the small darkened portion at the top of the moon's disk, most of the visible lunar disk will be in Earth's penumbra, the lighter portion of the planet's shadow that does not entirely block the sun's light,' astrophysicist Teresa Monsue of NASA's Goddard Space Flight Center told NPR.
The harvest full moon occurs every year in September, but this event will happen while the moon is at perigee, or its closest point to Earth. That means this harvest moon will be a supermoon.
It's rare for these events to happen at the same time. This is the second of four consecutive supermoons that will grace the skies through November.
During a lunar eclipse, the Earth passes between the sun and the moon, causing the moon to take on a red hue due to Rayleigh scattering of sunlight through the Earth's atmosphere.
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