Restored Soviet documentary from 1967 about the Venera-4 (Venus 4) mission. Extensive footage of hardware being assembled on Earth is shown. Models are then used to illustrate the mission in detail.
AI upscale (Topaz AI) was used to resample the film to full HD resolution. While it works in most cases, some artifacts are present in some sequences.
Subtitles were added. The text was adapted from an automated translation and is not literal.
The original footage was supplied by "for all mankind" - many thanks!
Sound and image cleanup, conversion to original 24 fps frame rate, geometry correction and AI upscale and color restoration by RetroSpace HD.
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Venera 4 (Венера-4, lit. 'Venus-4') was a 1967 probe in the Soviet Venera program for the exploration of Venus. The probe comprised a lander, designed to enter the Venusian atmosphere and parachute to the surface, and a carrier/flyby spacecraft, which carried the lander to Venus and served as a communications relay for it.
For the first time, in situ analysis of the atmosphere of another planet was performed and the data sent back to Earth; the analysis included chemical composition, temperature, and pressure. The measured ratio of carbon dioxide to nitrogen of about 13 corrected the previous estimates so much (an inverse ratio was expected in some quarters) that some scientists contested the observations.
The main station detected no radiation belts; relative to Earth, the measured magnetic field was 3000 times weaker, and the hydrogen corona was 1000 times less dense. No atomic oxygen was detected.
All the data suggested that water, if it had been present, had leaked from the planet long before. This conclusion was unexpected considering the thick Venusian clouds.
Because of the negligible humidity, the sugar lock system, employed on Venera 4 in case of a water landing, was abandoned in subsequent Venus probes.
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