Venus is not exactly a hospitable-sounding place. The planet's surface can reach temperatures of 800 degrees Fahrenheit. The atmospheric pressure is close to the psi found in a hydraulic car crusher . None of the landers that touched down there lasted more than an hour. Generally, it's a not a place that sounds very friendly to humans. But that's all on the surface. Just 30 miles up, conditions on Venus become incredibly Earth-like. In fact, the upper atmosphere of Venus is home to the most Earth-like conditions in our entire solar system. — Maggie
I love rediscovering cool things. I'm sure I learned, at some point, that the Soviet Union had once sent probes to land on the surface of Venus. But I had completely forgotten this fact until today.
This photo comes from Venera 9, which landed on Venus on October 22, 1975. The lander remained operational for 53 minutes, which isn't bad considering we're talking about a planet with hydrochloric acid and hydrofluoric acid in the atmosphere, and a surface temperature (as measured by Venera 9) of 905° F.
The photo — at three different phases of processing — comes from the website of Don Mitchell, an enthusiast of Soviet space history. Mitchell did the processing that resulted in the clear, bottom image in this stack.
The upper image is the raw 6-bit data. The center images include the telemetry brust replacements, with remaining bursts blacked out. The 6-bit values have been transformed to linear brightness, using the published photometric function of the camera, and then converted to sRGB standard form (gamma 2.2). In the final version, I filled in missing regions, using Bertalmio's inpainting algorithm.