What is the highest observed temperature on Venus in Fahrenheit?

The highest observed temperature on Venus is approximately 864 degrees Fahrenheit. This extreme temperature is primarily due to the planet's dense atmosphere, which is composed mostly of carbon dioxide and has clouds of sulfuric acid. This thick atmosphere creates a strong greenhouse effect, trapping heat and preventing it from escaping into space. As a result, even though Venus is not the closest planet to the Sun, it has the hottest surface temperatures of any planet in the solar system.

In comparison, other temperature options are not accurate representations of the highest observed temperature on Venus. While they might seem plausible, they fall short when considering the scientific data on Venus's atmospheric conditions and heat retention capabilities. Thus, 864 degrees Fahrenheit is recognized as the correct answer, reflecting the extreme environmental conditions on Venus.