When is the next solar eclipse? News By

Totality" is the name for the moment when the sun appears completely obscured by the moon. The path of totality is the narrow zone from which totality is visible on Earth. Technically, this path is just the movement of the moon's shadow across the world — specifically, the places where the moon's umbra, the darkest central part of its shadow, is projected across the Earth's surface. To experience totality, you must be within this zone.