On the night of September 7–8, the moon will slip into Earth’s shadow, darkening and shifting from silver to red during a total lunar eclipse. While this one won’t be visible from the Americas, much of the Eastern Hemisphere will have a perfect view to see the impressively long totality lasting 82 minutes.
This will be the second lunar eclipse of 2025, and thanks to its visibility across some of the world’s most populous geographical regions, nearly six billion people will have front row seats to this sky show.
What happens during a lunar eclipse?
A lunar eclipse occurs when the Earth passes directly between the sun and the moon, casting its shadow across the lunar surface. As the moon moves into the deeper, central part of Earth’s shadow, called the umbra, its familiar silvery glow shifts towards a distinctive coppery or reddish hue. Because the moon’s orbit is tilted, lunar eclipses don’t occur every month when there is a full moon, occurring only two or three times annually, and visible only on one half of the Earth.
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