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Saturday, December 21, 2019, will be the shortest day of the year – or it could occur on Sunday, December 22. It all depends...
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Saturday, December 21, 2019, will be the shortest day of the year – or it could occur on Sunday, December 22. It all depends...
It’s the northern end of Earth’s rotational axis, and its location, along with that of the South Pole, is affecting GPS measurements as well...