TEMPO.CO, Jakarta – Moon eclipse the longest of the century will occur on November 19, 2021. Because it occurs in November, the eclipse is also referred to as the beaver’s full moon in some countries.
According to Native American and early colonial traditions, November coincides with the season when traps are set to catch beavers. The goal is to get the fur of the mammals to keep residents warm during the coming winter months.
On the night of November 19, full moon named after the dam-building mammal brings with it a celestial phenomenon, a partial lunar eclipse, in which the Moon will be almost completely covered by Earth’s shadow. November’s full moon is also called the Ice Moon, because it brings cooler temperatures.
For stargazers hoping to see the otter moon, the skyline will rise at 5 p.m. ET on November 18 or 5 a.m. EDT on November 19, and will reach peak illumination at around 3:58 p.m. ET or 3:58 p.m. ET. The lunar eclipse will be visible (weather permitting) from North and South America as well as Australia and parts of Asia and Europe.
United States Institute of Aeronautics and Space, NASA, says the lunar eclipse will last 3 hours, 28 minutes, and 23 seconds, which will be longer than any other eclipse in the 100 years between 2001 and 2100. NASA says that Earth will witness a total of 228 lunar eclipses throughout the 21st century. For the most part, there will be two eclipses in a month, but there could also be three.
Lunar eclipses only occur during a full moon, when the Sun and Moon are near opposite sides of the Earth and a terrestrial shadow is cast on the lunar surface. There are three categories of lunar eclipses, namely total, partial and penumbral.
A total lunar eclipse occurs when the Moon enters completely the area behind the Earth where the Sun is completely blocked in shadow—called the umbra. A total lunar eclipse causes the Moon to appear red because light passing through the Earth’s atmosphere is filtered and refracted on the Moon’s surface. It is also called the “blood moon” because of its red color.
While a partial lunar eclipse is when the moon is partially in the umbra, the remainder is in the penumbra—where the Sun is only partially blocked by the Earth. During a partial lunar eclipse, the moon appears partially obscured by Earth’s spherical shadow, with the full moon still visible at one end.
And a penumbral lunar eclipse is a condition when the Moon is in the penumbra, but outside the umbra, which tends to dim the Moon’s light slightly. But it doesn’t have the dramatic shadow profile of other eclipses—where the Earth, Sun, and Moon are almost in a straight line. Penumbral lunar eclipses are sometimes almost invisible to the eye.
TEA POUR TIMES | GADGETS NDTV
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The Longest Lunar Eclipse of the Century Occurs on November 19
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