A total lunar eclipse will be viewable in the United States overnight into Friday morning, so some may want to pull an all-nighter to catch a good look at the rare celestial event, also known as the "blood moon.

Turn your eyes to the sky to catch a glimpse of the tonight's lunar eclipse. When is the best time to see it in Tennessee?

When sunlight hits Earth’s atmosphere during a lunar eclipse, light frequencies toward the blue end of the visible spectrum are scattered outward, away from Earth’s umbra, but those with longer wavelengths, toward the red part of the spectrum, are bent inward and cast onto the moon.