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tech / sci.astro.amateur / Imbolc

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o Imbolckellehe...@gmail.com

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Imbolc

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Subject: Imbolc
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 by: kellehe...@gmail.com - Fri, 4 Feb 2022 19:55 UTC

In the old traditions where daylight lengths were more important than seasonal temperature fluctuations, the beginning of February marked the end of winter and the 3 months period to the start of the New Year on Samhain or roughly November 1st in our calendar.

It means the North pole is presently about 45 degrees from the bright hemisphere of the Earth as it slowly turns in that direction. On the March Equinox, the North pole will turn into the bright hemisphere and the Sun will come into view for the first time in 6 months at that latitude defined by a zero rotation velocity.

https://eoimages.gsfc.nasa.gov/images/imagerecords/148000/148857/arctic_nsidc_2021259_plot.png

Arctic sea ice is presently still growing just as the coldest hours when considering daily rotation and temperature fluctuations across the day/night cycle come before the appearance of the Sun.

All planets have two separate surface rotations to the Sun with the North pole day/night cycle exclusively a feature of the Earth orbital motion insofar as that location has a net zero daily surface rotation. In the coming weeks the first sight of dawn will appear there until the single sunrise happens there around the March Solstice just as it happens at the South pole on the September Equinox-

https://www.youtube.com/watch?v=iPshCulaJHU

As the South or North poles continue to turn towards their Solstice points with the Sun in view, the circle of the Sun traces a smaller and smaller spiral until it reaches its tightest circle on the respective Summer Solstice..

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