26.9 MB (1.5 MB compressed)
3500 x 2686 pixels
29.7 x 22.9 cm ⏐ 11.7 x 9.0 in (300dpi)
SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Molniya 1 communications satellite. Testing the reaction wheel assembly of a Molniya-1 military communications satellite. The reaction wheels are used to control the spacecraft's orientation while on orbit. Molniya-1 was the first attempt by the Soviet Union to provide satellite-based communications for its armed forces. The first two test flights in 1964 were failures, but the third flight in October 1965 was a success. The Molniya satellites were launched into a highly-elliptical orbit which allowed them more time over the north polar regions than a sun-synchronous orbit, and better coverage than a geostationary orbit. Various satellites of the Molniya-1 type were launched, achieving operational status in 1968.
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