11-22-14 – Holometer – Fermilab – US Department of Energy – We are measuring properties of space and time at the very smallest scales.
How small? – Very small! The “Planck length” (discussed more below) is 10−35 meters. One millimeter is 0.001 or 10−3 meters, so the Planck Length has a lot more zeroes after the decimal place.
The Scale of the Universe 2 is a nice way to visualize length scales. Starting at 1 meter, you can zoom “out” to the estimated size of the Universe (1027 meters) and then zoom back “in” to fundamental particles.