Tiny Orbiting Planets Tell the Time On This Solar System Clock
https://www-newz.blogspot.com/2014/09/tiny-orbiting-planets-tell-time-on-this.html
We usually measure the time it takes for a planet in our solar system to orbit the sun in months and years. But given the compact scale of this desktop solar system, the anodized aluminium balls can instead be used to measure seconds, minutes, and hours.
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