A partial lunar eclipse is coming Thursday night, the longest in 580 years.

'The “beaver” moon will be 97 percent blocked by the darkest part of Earth’s shadow, becoming a “blood” moon.

Skywatchers on Thursday night will be treated to a near total lunar eclipse as the full moon is plunged into the blood-red light cast by Earth’s shadow. The spectacle will be visible from all of North America, with the exception of eastern Greenland, including the entire Lower 48, Alaska and Hawaii, as well as parts of South America and Russia.

While it’s technically not a total lunar eclipse, it’s about as close as one can get to totality without actually being there. At peak, 97 percent of the moon will be covered by the umbra, or the darkest part of Earth’s shadow. Only a sliver on the bottom left of the moon will remain faintly illuminated.

A striking element of Thursday night’s eclipse will be its duration — 3 hours, 28 minutes and 24 seconds, according to Space.com, which they say makes it the longest partial eclipse in 580 years.

At the time of the eclipse, the moon will be full. Some refer to the November full moon as the “beaver moon,” a name assigned by Native Americans when beavers were particularly active in preparation for winter and it was time to set traps, according to NASA. The November full moon is also sometimes called the Frost, Frosty or Snow Moon for the wintry conditions beginning at this time of year, NASA writes.

A moon, once eclipsed, is also sometimes called a “blood moon” due to its reddish or rusty tone.'

https://www.washingtonpost.com/weather/2021/11/17/lunar-eclipse-beaver-blood-moon/?