Happy June Solstice to all residents of planet Earth: Longest day of the year for north of the equator. Shortest for south of the equator. And for Equatorians, same old boring 12-hour day, just like every other day of the year.
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It’s always 12h on the equator (or there abouts) because as a great circle, the equator always shows half of its circumstance towards the sun, regardless of time of year/angle between axis of rotation and the ecliptic. https://en.wikipedia.org/wiki/Daytime
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Aaah, great circles strike again! I needed to have my attention turned to how great circles always show half of their circ.; I can now see the error of my thinking (Earth’s terminator’s plane wasn’t cutting the equator perfectly in half in my head. Updating my understanding now!)
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I love it when my Astronomy’s mag shows a series of photos taken from the same spot at high noon where the sun travels across the sky. The graph almost looks like the path the sun takes.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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