Every day, the Sun rises in the east, rides across the sky, and sets in the west. Once upon a time, people thought gods like Apollo carried the Sun on a chariot. But as it turns out, the Sun doesn’t move at all—we’re the ones doing all the moving.The sun’s motion is apparent, caused entirely by the movement of the Earth. Our planet both spins on its axis and orbits the Sun. These two motions combine together to create the Sun’s apparent motion. But because the Earth’s motions aren’t as steady as we like to think, relying on the Sun’s apparent motion to keep track of time leads to all sorts of s. For one, noon wouldn’t happen at the same time every day!Our clocks don’t follow the Sun—they only do so approximately. The time on your watch is based off something called mean solar time, which is basically what time it would be if the Sun and Earth were a little more reliable. In this project, you’ll get to see just how far off our clocks are from the Sun.

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