• By Jesus Diaz
    Jul 15, 2009 3:40 PM 104,754
    read more: #imagecache, #kilogramspheres, #spheres, #science

    World's Most Perfect Pair of Balls—Yes!

    This is one of the two most perfect spheres ever. Exactly one kilogram—Imperial units be damned 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).

    They were made using silicon by metrologists from the by Australia's Commonwealth Scientific and Industrial Research Organization. [Makezine]


    Send an email to Jesus Diaz, the author of this post, at jesus@gizmodo.com.