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LoginThis Monday, May 16th will include a total lunar eclipse and is part of an almost tetrad. It's an opportunity and is explained in the video.
From You are not allowed to view links.
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Login"A tetrad is a phenomenon where four consecutive eclipse seasons each contain a total lunar eclipse. In other words, it is four “Blood Moons” in a row, about six months apart. The term comes from the Greek word tetras, which means a group of four.
"Tetrads are not particularly rare, although they come in interesting cycles of around 600 years. For about 300 years, there are no tetrads at all. This is followed by a period of roughly 300 years where a tetrad occurs every 15 years or so.
"At the moment, we are about halfway through the second half of this cycle. The last tetrad took place in 2014-2015; the next will happen in 2032-2033.
"There is almost a tetrad in 2021-2022, with total lunar eclipses on May 26, 2021, May 16, 2022, and November 8, 2022, and a big partial lunar eclipse on November 19, 2021. The magnitude of the partial eclipse is 0.97—although this is a fraction short of being total, it will look very similar to a total eclipse, and the Moon will acquire a noticeably reddish tint."
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