Moongazers unite! The longest partial lunar eclipse of this century will occur overnight, peaking early Nov. 19 at 4:03am ET (09:03 UTC). Find out what parts of the world will be able to see it:
lunar eclipse in a millennium, clocking in at 3 hours, 28 minutes and 23 seconds. There hasn’t been a longer partial lunar eclipse since February 18, 1440 and it will remain the longest partial lunar eclipse for 648 years until February 8, 2669 . There will be a longerPartial lunar eclipse of November 18/19, 2021: 3:28:23This is a long eclipse for two main reasons: 1) The Moon’s orbital speed and 2) The near-totality of the eclipse.
First, the Moon’s orbit around the Earth is not a perfect circle, and the Earth is off-center within the orbit so sometimes the Moon is closer to the Earth and sometimes it is farther away. This change in distance impacts the Moon’s orbital speed. Closer to the Earth, the Moon moves faster, while further away, it travels more slowly. Right now, the Moon is near its farthest point in its orbit around the Earth and thus, moves slowly through Earth’s shadow.
Second, since this eclipse is almost-total, the Moon spends a longer amount of time in the Earth’s umbra than it would in a ‘more-partial’ eclipse.During the eclipse, the Moon moves through the western part of the constellation Taurus. The Pleiades star cluster is to the upper right, and the Hyades cluster ― including the bright star Aldebaran, eye of the bull ― is in the lower left.
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