Venera 15 and 16
Date: 2 Jun 1983
A model of the Venera 15 and 16 orbiters.
Venera 15 and Venera 16 were a pair of dedicated radar mappers designed to extend the studies begun by the American Pioneer Venus Orbiter in constructing a detailed map of the surface down to a resolution of about 1 to 2 kilometers.
Image Credit: NASA