Friday, June 23, 2023

The Summer Solstice, the latest sunset, and the earliest sunrise

The other day, on the Summer Solstice, I came across a surprising astronomical fact: while the Solstice is the longest day of the year, the sun does not immediately begin to set earlier. On the contrary, even though the days do begin to get shorter right after the Solstice, the latest sunset of the summer is a few days later (on 27 June this year). And the earliest sunrise correspondingly occurs a week or so earlier than the Solstice (on 15 June this year). As the original post I read about this pointed out (which I cannot find, but which several sites confirm), this is caused by the Earth's elliptical orbit. (Andrew Shields, #111words, 23 June 2023)

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