What significant visual achievement occurred with the Venera 9 and 10 missions in 1975?
Answer
Providing the first images of the surface
Venera 9 and 10, which arrived in 1975, were landmark missions that provided the first actual images of the Venusian surface. These landers utilized a specialized slow scanning method, which built images line by line through a rotating mechanical shutter, offering humanity its first true visual representation of the alien landscape.

#Videos
The First and Only Photos From Venus - What Did We See? (4K)
The Surface of Venus - Our Only Images - YouTube
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