spheres

World’s Most Perfect Pair Of Balls

World’s Most Perfect Pair Of Balls

This is one of the two most perfect spheres ever. Exactly one kilogram—Imperial units be damned and forbidden forever—smooth to the nearest 0.0000000003 meter (1.18110236 × 10-8 inches,) and round to within 0.00000005 meters (1.96850394 × 10-6 inches.)