Engineers at NASA's Jet Propulsion Laboratory working on the 10-sided central structure, or "bus," of the Voyager 2 spacecraft

Voyager 2 Flight Hardware

This archival photo shows engineers at NASA's Jet Propulsion Laboratory working on the 10-sided central structure, or "bus," of the Voyager 2 spacecraft on February 24,1977.

Credits: NASA/JPL-Caltech