February's Snow Moon is no ordinary full moon in most parts of the world, as it coincides with a special lunar eclipse that will cast a shadow over the full moon's usual bright, glowing face.
On Friday (Feb. 10), just 10 minutes after the full moon peaks, so will a penumbral lunar eclipse. The moon will spend more than 4 hours coasting through Earth's outer shadow, called the penumbra, and it will appear darker than normal.
While penumbral eclipses can be difficult to see and don't look nearly as dramatic as a total lunar eclipse — in which the moon passes through the darkest, central part of Earth's shadow — Friday's penumbral eclipse will be darker and more noticeable than most lunar eclipses of its kind. That's because the moon will veer so deeply into Earth's penumbral shadow that it will be almost entirely submerged in shade.