Daniel de Bruin, the owner of the YouTube channel, has crafted an attractive product — a machine that visualizes astronomical things, according tomedia. That figure, he says, is larger than the sum of all the atoms in the known universe. To this end, he built a machine with 100 connected gears.
When the gear is turned at one end, it slowly turns the rear gear at a speed of 1 to 10. For example, 10 full rotations of the first gear cause the second gear to rotate once. If you’re interested, do a calculation, and the number of rotations required for the first gear is astronomical when the last gear needs to be rotated once.
Although this machine is only a prototype, but had to it really very charming.