text: Each pervious mission was a failed mission because no spacecrafts survived the landing, not even a few hours. And, its because a thick atmosphere that was a big atmosphere of amost 97 percent carbo dioxide blankets Venus. What's even more of a challenge are the clonds of the highly corrosive sulfuric acid in Venus's atmosphere that maade the temperatures average over 800 degrees Fahrenheit, and the atmospheric pressure is 90 times greater than what they experience on Earth.