During a solar eclipse, the region on Earth where the Sun is completely obscured by the Moon is known as the ____.

During a solar eclipse the area on Earth where the Sun is totally hidden by the Moon is called the umbra. The umbra is the darkest part of the Moon’s shadow, where the Moon blocks all of the Sun’s light. As the Moon moves across the Sun, the umbra sweeps across the Earth’s surface, creating a brief path of total darkness. For example, when the umbra passes over a town, that town experiences a total solar eclipse. Outside the umbra, the Sun is only partially covered in the penumbra.