The World’s Roundest Sphere

Achim Leistner Australian optician of German origin Achim Leistner is an Australian optician of German origin.[1] During his retirement, he was asked to join the Avogadro project to craft a silicon sphere with high smoothness, as automated machining does not match his precision.[2] Silicon sphere used in the Avogadro project being inspected by Achim Leistner. Quick Facts Born, Known for ... In addition to precision instruments, Leistner uses his hands to feel for irregularities in the roundness of the sphere.[1] The research team has called his extraordinary sense of touch "atomic feeling".[3] As a result the sphere is the roundest man-made object ever manufactured in the world. If the sphere was scaled to the size of Earth, it would have a high point of only 2.4 m (7 ft 10 in) above "sea level".[Note 1]

A screenshot of a Wikipedia-style article about Australian optician Achim Leistner inspecting an extremely precise silicon sphere for the Avogadro project. The joke presents his extraordinary tactile precision as “atomic feeling” and claims that the sphere would be almost perfectly round even at Earth scale, creating an absurdly serious fake-scientific explanation for a humorous image. EN: A screenshot of a Wikipedia-style article about Australian optician Achim Leistner inspecting an extremely precise silicon sphere for the Avogadro project. The joke presents his extraordinary tactile precision as “atomic feeling” and claims that the sphere would be almost perfectly round even at Earth scale, creating an absurdly serious fake-scientific explanation for a humorous image.

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