The disc is gold-plated copper. The cover shows how to play it from the outside in, with the ceramic stylus. The pulsar map and the hydrogen transition are the published clock and ruler. A wrong match adds 5 seconds.
You are gowned for the clean room, mounting the images and the ceramic stylus on the disc that will fly with Voyager.
W A S D walk Shift run Mouse look (click to capture) E or hold left mouse to mount Esc free the mouse
Voyager 1 launched on 5 September 1977. In November 1980 it flew past Saturn — Voyager 1 on 12 November 1980. The gold-plated copper disc, with its cover diagram and stylus, is still mounted on the hull.