text: The athor states that Venus has proven many times before that it is not an easy planet to study. Each mission to land on venus was unmanned and for good reason, no aircraft would last more than a few hours. This explains why not a spaceship has touched down on venus in more than three decades. Many things contribute to Venus's reputaion as a challenging planet for us humans to study. Some of these things are a thick atmosphere of 97 percent of carbon dioxide covers the Venus, even more challenging are the clouds of extremely corrosive sulfuric acid in the atmosphere and on the planets sufare the average temperature is over 800 degrees Fahrenheit, and the pressure of the atmosphere is 90 tines greater than what we experience on our own planet. These conditions are far more intense than anything humans can find on earth. An enviroment like venus's Would crush a submarine accustomed to driving in the deepest parts of the ocean and would liquefy minerals. All these things plus more is why every mission so far has been unmanned, and why there hasnt been a singe spaceship that has landed in Venus in almost 3 decades.