By maxinpower on Skatehive
Since it was equinox time again this week, I became a little curious and did some research. Nowadays, it has become quite easy to find answers to open questions, even if you can't always be sure that they are completely correct. I wondered whether day and night really are the same length everywhere in the world during the time of the spring and autumn equinox. Since we unfortunately only have 24 hours in a day, the light and dark periods of the day should be exactly 12 hours each. And as I thought – on the two days of the equinox, i.e. in spring (around March 20) and in autumn (around September 22/23), day and night are almost the same length – approximately 12 hours. And this applies worldwide, but with slight variations. But why isn't it exactly 12 hours everywhere? This is due to atmospheric refraction. Yes, it's getting scientific, and I'm venturing into uncharted territory and very thin ice. The Earth's atmosphere refracts sunlight so that the sun is visible before it actually app