I read an article that says it happens every 19.6 years, but this is the first time since 1226 that it has happened during earth’s night so we can see it. I don’t understand how that happens that it is only 1 out of the last 42 times it has occurred.
In: Physics
Each planet’s orbit is independent of the others. Meanwhile none of the orbits have any sway over the rotation of the Earth. So you’ve got 4 extremely different variables (Earth’s orbit, Earth’s rotation, Jupiter’s orbit, and Saturn’s orbit) all running independently, just waiting on all of them to line up perfectly. 1 out of 42 isn’t that bad of a win when you think about just how unlikely it would be that al of those variables line up.
You may as well pick 4 random dudes from across the globe, and call it a win when all 4 of them happen to crave mashed potatoes on the same day.
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