The final total lunar eclipse in three years will be seen today on four continents. Viewers across North and Central America, Asia, Australia, the Pacific Islands, and portions of South America will be able to see this celestial display.

When Earth is between the sun and the moon, a lunar eclipse occurs, covering the moon's surface with a shadow. The moon will become a bloody crimson color as it passes into the shadow of the Earth.

During a total lunar eclipse, the entire Moon is submerged in the umbra, the region of Earth's shadow that is the darkest. The Moon will take on a red color when it is inside the umbra. Due to this phenomena, lunar eclipses are frequently referred to as "Blood Moons."

Considering that the Moon completes one orbit of the Earth every 27 days, many people are curious as to why lunar eclipses don't occur every month. The Moon frequently travels above or below Earth's shadow because of how inclined its orbit around the Earth is in comparison to how Earth orbits the Sun. Only when the Moon is directly behind Earth in relation to the Sun can there be a lunar eclipse.

The second and last lunar eclipse of 2022 will be this one. The most recent one occurred on May 16, 2022.

According to Alphonse Sterling, an astrophysicist at NASA's Marshall Space Flight Center in Huntsville, Alabama, lunar eclipses typically happen about every 1.5 years. But viewers should take advantage of the eclipse this November because it will be the last total lunar eclipse until 2025.

Unlike solar eclipses, observing a lunar eclipse does not require specific eye protection (which occurs during the daytime). While a pair of binoculars or a telescope can improve the view, the lunar eclipse can be seen with the unaided eye.