At the Geneva History of Science Museum, I learned about sun dials. The sun dial that was displayed to us showed the time of the sunrise/sunset. One of the sundial rings represents latitude and is adjusted according to your location. Another ring represented the different months in a year. Instead of displaying months it displayed the horoscope names, like Libra, Cancer, Leo and etc. When lined accordingly, it will tell you at approximate time of sunrise and sunset. We added an hour to our times due to the daylight savings time and after doing so, our times were accurate.
There were many sun dials located inside and outside of the museum. The sun dials could tell you the time, the monthly constellation, sunsets and more. It was fun learning about ways people used to be able to determine time and location without electricity making it easy.
I found this interesting as well. It was cool to see and understand how the instrument works and to see how accurate it was.
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