On October 22, 1975, the Soviet Venera 9 lander became the first spacecraft to return an image from the surface of another planet. NASA’s archive shows angular rocks, a visible horizon and a piece of the lander in the frame. The camera operated for only about 53 minutes.

The engineering is as interesting as the picture. The lander had to survive crushing atmospheric pressure and temperatures around 455°C. One camera lens cover failed to release, so the mission returned only part of its planned panoramic view.

The action is purely exploratory: open NASA’s original image, then compare it with a modern reconstructed panorama. It is a wonderful example of how a tiny amount of data can be more historically important than thousands of contemporary photos.

What to do: Open the original Venus photograph and compare it with the reconstructed view.