May 30, 1971 –
The US space probe Mariner 9, the first satellite to orbit Mars, was launched on this date.
Over the years, it will send more than 7,000 pictures of the planet back to Earth. The images revealed what appear to be ancient dry riverbeds on the surface, suggesting the presence of water on Mars at some point in the past. Mariner 9 photographed the entire surface of Mars.
The Haus of Dcaligari 