Longest lunar eclipse in 580 years. When and how to see it?

Author : News Agency

Source : 112 Ukraine

On Friday, November 19, we will have a special lunar eclipse - it will be the longest in this century, according to the American space agency NASA. It will also be partial. Unlike solar eclipses, lunar eclipses can be observed without special filters, because they are safe for sight
21:00, 18 November 2021


According to NASA, the peak of the eclipse will last 3 hours 28 minutes 23 seconds, making it the longest in 580 years. The longest total lunar eclipse in this century occurred on July 27, 2018, lasting about an hour and 43 minutes.

Related: Lunar eclipse 2017: What "bloody moon" forebodes

What you need to know about a lunar eclipse

A lunar eclipse occurs when the Sun, Earth, and Moon align so that the Moon transitions into the Earth's shadow.


In a total lunar eclipse, the entire Moon falls into the dark part of the Earth's shadow. During a partial lunar eclipse on November 19, up to 99.1% of the lunar disk will be shadowed, NASA says. At the same time, the Griffith Observatory in Los Angeles claims that as much as 97% will be shadowed.

There is also a penumbra eclipse - the Moon passes through the Earth's penumbra or the faint outer part of its shadow. The moon dims so faintly that an eclipse is difficult to see.


"Eclipses serve as a good reminder of the geometry and motion of our solar system. It is not every day that you can directly experience this motion of astronomical-scale objects ... right in front of your eyes," says Vanderbilt University astronomer Dr. Keivan Stassun.

Unlike lunar eclipses, which only occur during a full moon, a solar eclipse can only occur during a new moon.

Related: Lunar eclipse 2017: What "bloody moon" forebodes

Why will the moon be exactly red?

More than 97% of the full moon will be colored red by the shadow of the earth. This is the same phenomenon that makes our skies blue and sunsets red, NASA explains. The phenomenon that causes the moon to turn red during an eclipse is called Rayleigh scattering.


Light travels in waves, and different colors of light have different wavelengths. Blue light has a shorter wavelength and is more easily scattered in the Earth's atmosphere than red. During an eclipse, the Moon turns red because it is the only sunlight reaching the Moon and passing through the Earth's atmosphere.

But the eclipse will happen in several stages:

the beginning of the penumbra eclipse: 08:02:09 (Kyiv time).

the eclipse will peak at 11:03 Kyiv time - the moon will become darker, reddish-brown.

after the peak, the full shadow of the Earth will begin to slowly move from the moon to the lower right corner, before completely leaving the full shadow by 14:00.

Where and when it will be possible to see

The eclipse can be seen on November 19 from South America, Australia, Southeast Asia, and in parts of Alaska and Hawaii, it can be seen on Thursday, November 18. Some parts of the shading are visible in the northwest and north of Europe and in the northeast of the European part of Russia. The Ukrainians, unfortunately, will not be able to see the eclipse live.


To check the visibility of an eclipse for your city, use the Eclipse Guide app. It will show the entire path of the moon, an accurate map of the eclipse and other useful information.

But for those who will not be able to see the eclipse, they will launch an online broadcast from the Griffith Observatory in Los Angeles


Why is the eclipse called the Beaver Moon?

Another interesting point. In North America, Indians, Europeans, and Colonial Americans gave their names to the full moons. The full moon in November is called the Beaver Moon (mid-fall has traditionally been the time for hunters looking for beaver hide to set traps before the water freezes).


Here are some more examples of the names of the November full moon: White Moon (China), Frosty Moon (Cree Indians), Dark Moon (Celts), Snow Moon (medieval England), Flower Moon (South Africa), Corn Moon, Milky Moon, Hare Moon (Southern Hemisphere).


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