text: What factors exactly make the exploration of Venus so difficult? Although Venus may once have been "the most Earth-like planet in our solar system," it no longer appears to be that way. According to the article, the atmosphere is almost 97 percent carbon dioxide, and the clouds contain highly corrosive sulfuric acid. Also, the average temperature is over 800 degrees Fahrenheit. These conditions are nothing like ones that are found on Earth. This environment would crush a submarine and would liquify metals, as stated in paragraph 3. Along with the atmospheric difficulites, weather difficulties also present themselves. The article states that volcanoes, earthquakes, and lightning strikes would be a danger to anything looking to land on Venus's surface.