The science behind the Equinox

The science behind the Equinox
The science behind the Equinox

September 22nd is the Autumnal Equinox for 2020, the fall season’s start for the northern hemisphere.

Standing here on Earth’s surface, nothing may seem particularly out of the ordinary. When you look at it from afar, though, our entire world is slightly off-kilter. As the Earth traces its elliptical path around the Sun every year, the axis it rotates around each day is tilted with respect to that path, by roughly 23.4 degrees.

While we don’t feel the tilt itself, we see its effects, specifically in the changing seasons throughout the year. The planet does not ‘wobbling’ back and forth by 23.4 degrees during the year, though. Earth’s tilt remains roughly the same all year long, with the planet’s axis always pointing out of the North Pole towards a star named Polaris. It’s this consistent tilt, along with our world’s motion around the Sun, that

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