Earth Clock: The History of Our Planet in 24 Hours

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CUSTOM MODELS AVAILABLE: Just contact us and we’ll do our best to satisfy any kind of custom request. After that, do the activity as described above – the Earth observer will see the same motion of the Sun across the sky! In a time when most educated people believed that the Sun revolved around the Earth every day, Aristarchus theorized that a spinning Earth and a stationary Sun would explain the same diurnal motion we see in the sky each day as the Sun rises, crosses the sky from east to west, and then sets again.

Or in an environment where there is intense heat or over exposure to sunlight from, but not limited; sun through a window/conservatory/summer room/greenhouse/over a cooker/radiator/fire/wood burner. The real difficulty of the design was to find a gear combination linking the day rotation and the year rotation and to keep it compact. There is more than one model which can explain why the Sun and Moon rise in the east and set in the west each day. Finance is provided by PayPal Credit (a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH).Competing theories sometimes exist in science, sometimes for hundreds of years before the issue is decided. Each clock has been handmade using scratched vinyl supplied by partner DJs, each VINYL CLOCK is as eco-friendly as it is unique: the label on the record is always different. If you are using a folding piece of cardboard such as a science fair poster board, you can attach the yardsticks with Velcro. But if our species is to survive, we need a constant, public reminder of our climate Deadline (and solution Lifelines) — everywhere! IMPORTANT NOTICE: We use recycled vinyl records, the LABEL on your record clock WILL DIFFER from the one shown in picture.

Alternatively, you can staple two different colors of construction paper to the flags and mark them that way.

Make sure your wall is strong enough to hang your clock from and ensure your suitable fixing is anchored securely to the wall. hours is used as the center point of the graph because that represents a day perfectly divided with equal hours of daylight and darkness. More than 2,200 years ago, a Greek named Aristarchus of Samos came up with the first known heliocentric model of the solar system. Imagine that the Earth spun four times faster, spinning on its axis every six hours instead of a leisurely 24 hours.