Lunar Eclipse 2021, longest partial lunar eclipse in over 500 years; All you need to know

The day of the lunar eclipse has reached and it is on November 19 as it was found by stargazers earlier. The eclipse will occur on November 19 and will be visible only in north-eastern India for a brief period of time. 

The celestial event is rare as it is one of the longest since 1440 and the longest until 2669. This eclipse has a long partial phase primarily because it is entirely partial. Any total eclipse includes a period of more than 97% partiality like the maximum eclipse point of this one. Unlike a total solar eclipse, extended duration is not sought after by observers.

According to NASA, the longest partial lunar eclipse in over 500 years will occur sometime during the evening, depending on the time zone and area. Parts of South America can catch a glimpse at moonset, and parts of East Asia and Australia might see the eclipse at moonrise.

According to Sky and Telescope magazine, the eclipse can be divided into the penumbral and umbral phases. The penumbra is the outer edge of the Earth’s shadow, lasting over six hours, and the umbra is the deepest part of the shadow, lasting 3.5 hours. 

As the Earth moves backward, the Moon is seen 99 percent of the time falling in the shade of red on the sky show. Space scientists say sky-watchers in those parts who are blessed with a cloud-free view will see a slight dimming of the Moon from 0602 GMT Friday as it enters Earth’s penumbra – the outer shadow. An hour later, the moon appears to have been bitten by a giant from the disk, as it starts to go for full shadow.

The red color is caused by a phenomenon known as “Rayleigh scattering”, where the shorter blue light waves from the Sun are dispersed by particles in the Earth’s atmosphere.

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Lunar Eclipse 2021

A lunar eclipse happens when the earth comes in between the sun and the moon and casts a shadow on the latter for a brief period of time. However, the event is not visible fully in all parts of India, if the weather is positive, then residents of Arunachal Pradesh and Assam will be able to watch the concluding stages of this event. On Friday, November 19, the lunar eclipse will begin at 11:34 am and end at 05:33 pm. The conclusion of the partial phase would be seen from the states of Arunachal Pradesh and Assam shortly after the moonrise.

The last lunar eclipse was on July 27, 2018. The next lunar eclipse will be on May 16, 2022, but India is not going to witness it.