Soviet probe outlasts expectations on Venus
In 1982, a Soviet probe named Venera 13 landed on Venus and operated for 127 minutes, far exceeding the designers’ expectation of 32 minutes. It captured two color panoramas of the surface, providing the only color images of Venus’s landscape taken directly from the surface.Extreme conditions on Venus
The Venusian surface is extremely hot, reaching 457 °C, and under a pressure of 89 Earth atmospheres, which is equivalent to the pressure found 900 meters beneath the ocean. At such conditions, materials like lead melt at 327 °C, and tin and zinc melt at even lower temperatures.Probe’s journey and landing
The journey to Venus took four months, and the probe’s descent vehicle deployed a parachute at 63 kilometers altitude. After releasing a glider at 47 kilometers, it continued descending until it landed on the surface at 03 h 57 UTC near the Phoebe Regio region. It operated for 127 minutes before its cameras stopped working.Camera system and image transmission
Venera 13 had cameras on both sides of its body that scanned opposite fields after their covers were ejected using pyrotechnic charges. It used a color television system with blue, green, and red filters, and a relay module transmitted these images back to Earth.Surface features and atmospheric color
The images captured by Venera 13 show flat, angular plates on a dark, fine-grained surface, with no dunes or significant relief. The sky appears orange due to the thick atmosphere, which is rich in carbon dioxide and absorbs blue light before it reaches the surface. Different teams have analyzed the data over the past 40 years with slightly varied color balances.Soil sample and geological insights
A drilling arm on Venera 13 collected a soil sample, which was stored in a chamber at 30 °C and 0.05 atmosphere. Analysis revealed an alkaline rock rich in potassium, unlike the basalt collected by Venera 14, 950 kilometers away. This suggests that the Venusian crust is still poorly understood.Limited surface exploration since Venera
No other lander has visited Venus’s surface since the Vega missions in 1985, due to the extreme heat, pressure, and corrosive atmosphere that destroy equipment quickly. Missions like Magellan and Venus Express have studied the planet from orbit using radar and atmospheric analysis.Future plans for Venus exploration
NASA is preparing the Davinci mission, which will send a descent sphere to analyze Venus’s atmosphere. The mission is expected to launch by the end of the decade. Until then, the two color panoramas from Venera 13 remain the only direct images of Venus’s surface taken in color.
