Metadata
Author: WikiMatrix
Data
English[en]
The program featured cooperation from 14 other nations, including Sweden, Switzerland, Austria, France, West Germany, and the United States (which contributed the use of its NASA Deep Space Network for tracking the twin spacecraft).
Spanish[es]
Participaron, entre otros, Suecia, Suiza, Austria, Francia, Alemania Occidental, Bulgaria y los Estados Unidos (que contribuyó mediante su Red del Espacio Profundo para el seguimiento de la misión).