On November 19, 2021, there will be a partial lunar eclipse. Lasting about 6 hours, this will be the longest partial eclipse within a stretch of about 1,000 years.
The last partial lunar eclipse that stretched longer happened on February 18, 1440.
The next time Earth will see a partial lunar eclipse as lengthy as this month’s will be on February 8, 2669.
Not only will it be the longest, but it will also be one of the rare times that the sun the Earth and the moon will be in near perfect alignment.
Why is the November 2021 eclipse so long?
41 hours is when the maximum point of the eclipse, just before the Moon reaches apogee, its farthest point from Earth.
The farther away the Moon is, the slower it travels along its orbit, and the longer it takes to pass through Earth’s shadow.
For North America, the best viewing for the partial lunar eclipse is overnight, November 18, 2021.
More on 2021 Partial Eclipse…
https://earthsky.org/astronomy-essentials/partial-lunar-eclipse-november-19-2021/
