Tonight (Aug. 27-28), the full Sturgeon Moon will slip into Earth's shadow, creating a stunning "almost blood moon" as up to 96.2% of the lunar surface disappears into the darkest part of our planet's shadow, the umbra.
At maximum eclipse, much of the moon may take on an eerie reddish hue as sunlight filtered through Earth's atmosphere is refracted into the shadow and onto the lunar surface. Only a thin sliver of moon will escape Earth's umbra, appearing as a bright arc against an otherwise dim, rusty-red lunar disk.
