The umbra is a full, dark shadow, and the penumbra is a partial outer shadow. There are three types of lunar eclipses depending on how the sun, Earth and moon are aligned at the time of the event.

The upcoming eclipse's totality will last about 65 minutes. During an eclipse, 2 shadows are cast: umbra & penumbra. The umbra is where the Sun is completely hidden behind Earth. The real action ...

Over the course of the next 57 minutes, the Moon will dim as it travels through the penumbra. Then, at 7:33 p.m. PT / 10:33 p.m. ET, the Moon will reach the umbra, at which point it will become ...

and penumbra (the lighter outer shadow)—can last up to 3–4 hours. However, the totality phase—when the moon is fully within Earth's umbra and appears reddish—typically lasts between 30 ...